UPDATE: WIP

FIX: Refactor both dialogs to get common code
FIX: Lifts TemplateDialog to App.tsx
2025-10-12 17:01:52 +02:00 · 2025-10-12 14:23:12 +02:00 · 2025-10-12 14:23:12 +02:00 · 2025-10-12 14:23:12 +02:00 · 2025-10-12 14:23:12 +02:00 · 2025-10-12 14:23:12 +02:00
66 changed files with 1617 additions and 1871 deletions
--- a/7
+++ b/7
@@ -31,12 +31,7 @@ clean: remove-artifacts
 	rm -r -f base/target
 	rm -r -f xlsx/target
 	rm -r -f bindings/python/target
-	rm -r -f bindings/wasm/target
-	rm -r -f bindings/wasm/pkg
-	rm -r -f webapp/IronCalc/node_modules
-	rm -r -f webapp/IronCalc/dist
-	rm -r -f webapp/app.ironcalc.com/frontend/node_modules
-	rm -r -f webapp/app.ironcalc.com/frontend/dist
+	rm -r -f bindings/wasm/targets
 	rm -f cargo-test-*
 	rm -f base/cargo-test-*
 	rm -f xlsx/cargo-test-*
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ And then use this code in `main.rs`:

 ```rust
 use ironcalc::{
-    base::{expressions::utils::number_to_column, model::Model},
+    base::{expressions::utils::number_to_column, Model},
    export::save_to_xlsx,
 };

--- a/base/CALC.md
+++ b/base/CALC.md
@@ -1,61 +0,0 @@
-# Evaluation Strategy
-
-
-We have a list of the spill cells:
-
-```
-// Checks if the array starting at cell will cover cells whose values
-// has been requested
-def CheckSpill(cell, array):
-    for c in cell+array:
-        support CellHasBeenRequested(c):
-        if support is not empty:
-            return support
-    return []
-
-// Fills cells with the result (an array)
-def FillCells(cell, result):
-
-
-def EvaluateNodeInContext(node, context):
-    match node:
-        case OP(left, right, op):
-            l = EvaluateNodeInContext(left, context)?
-            r = EvaluateNodeInContext(left, context)?
-            return op(l, r)
-        case FUNCTION(args, fn):
-            ...
-        case CELL(cell):
-            EvaluateCell(cell)
-        case RANGE(start, end):
-            ...
-
-
-
-def EvaluateCell(cell):
-    if IsCellEvaluating(cell):
-        return CIRC
-    MarkEvaluating(cell)
-    result = EvaluateNodeInContext(cell.formula, cell)
-    if isSpill(result):
-        CheckSpill(cell, array)?
-        FillCells(result)
-
-
-def EvaluateWorkbook():
-    spill_cells = [cell_1, ...., cell_n];
-
-
-    for cell in spill_cells:
-        result = evaluate(cell)
-```   
-
-
-
-
-
-
-
-# When updating a cell value
-
-If it was a spill cell we nee
--- a/base/src/actions.rs
+++ b/base/src/actions.rs
@@ -22,7 +22,7 @@ impl Model {
            .cell(row, column)
            .and_then(|c| c.get_formula())
        {
-            let node = &self.parsed_formulas[sheet as usize][f as usize].0.clone();
+            let node = &self.parsed_formulas[sheet as usize][f as usize].clone();
            let cell_reference = CellReferenceRC {
                sheet: self.workbook.worksheets[sheet as usize].get_name(),
                row,
--- a/base/src/arithmetic.rs
+++ b/base/src/arithmetic.rs
@@ -77,6 +77,8 @@ impl Model {
                        match to_f64(&node) {
                            Ok(f2) => match op(f1, f2) {
                                Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                Err(Error::VALUE) => data_row.push(ArrayNode::Error(Error::VALUE)),
                                Err(e) => data_row.push(ArrayNode::Error(e)),
                            },
                            Err(err) => data_row.push(ArrayNode::Error(err)),
@@ -98,6 +100,8 @@ impl Model {
                        match to_f64(&node) {
                            Ok(f1) => match op(f1, f2) {
                                Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                Err(Error::VALUE) => data_row.push(ArrayNode::Error(Error::VALUE)),
                                Err(e) => data_row.push(ArrayNode::Error(e)),
                            },
                            Err(err) => data_row.push(ArrayNode::Error(err)),
@@ -133,6 +137,10 @@ impl Model {
                            (Some(v1), Some(v2)) => match (to_f64(v1), to_f64(v2)) {
                                (Ok(f1), Ok(f2)) => match op(f1, f2) {
                                    Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                    Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                    Err(Error::VALUE) => {
+                                        data_row.push(ArrayNode::Error(Error::VALUE))
+                                    }
                                    Err(e) => data_row.push(ArrayNode::Error(e)),
                                },
                                (Err(e), _) | (_, Err(e)) => data_row.push(ArrayNode::Error(e)),
--- a/base/src/cell.rs
+++ b/base/src/cell.rs
@@ -64,50 +64,12 @@ impl Cell {
    /// Returns the formula of a cell if any.
    pub fn get_formula(&self) -> Option<i32> {
        match self {
-            Cell::CellFormula { f, .. }
-            | Cell::CellFormulaBoolean { f, .. }
-            | Cell::CellFormulaNumber { f, .. }
-            | Cell::CellFormulaString { f, .. }
-            | Cell::CellFormulaError { f, .. }
-            | Cell::DynamicCellFormula { f, .. }
-            | Cell::DynamicCellFormulaBoolean { f, .. }
-            | Cell::DynamicCellFormulaNumber { f, .. }
-            | Cell::DynamicCellFormulaString { f, .. }
-            | Cell::DynamicCellFormulaError { f, .. } => Some(*f),
-            Cell::EmptyCell { .. }
-            | Cell::BooleanCell { .. }
-            | Cell::NumberCell { .. }
-            | Cell::ErrorCell { .. }
-            | Cell::SharedString { .. }
-            | Cell::SpillNumberCell { .. }
-            | Cell::SpillBooleanCell { .. }
-            | Cell::SpillErrorCell { .. }
-            | Cell::SpillStringCell { .. } => None,
-        }
-    }
-
-    /// Returns the dynamic range of a cell if any.
-    pub fn get_dynamic_range(&self) -> Option<(i32, i32)> {
-        match self {
-            Cell::DynamicCellFormula { r, .. } => Some(*r),
-            Cell::DynamicCellFormulaBoolean { r, .. } => Some(*r),
-            Cell::DynamicCellFormulaNumber { r, .. } => Some(*r),
-            Cell::DynamicCellFormulaString { r, .. } => Some(*r),
-            Cell::DynamicCellFormulaError { r, .. } => Some(*r),
-            Cell::EmptyCell { .. }
-            | Cell::BooleanCell { .. }
-            | Cell::NumberCell { .. }
-            | Cell::ErrorCell { .. }
-            | Cell::SharedString { .. }
-            | Cell::CellFormula { .. }
-            | Cell::CellFormulaBoolean { .. }
-            | Cell::CellFormulaNumber { .. }
-            | Cell::CellFormulaString { .. }
-            | Cell::CellFormulaError { .. }
-            | Cell::SpillNumberCell { .. }
-            | Cell::SpillBooleanCell { .. }
-            | Cell::SpillErrorCell { .. }
-            | Cell::SpillStringCell { .. } => None,
+            Cell::CellFormula { f, .. } => Some(*f),
+            Cell::CellFormulaBoolean { f, .. } => Some(*f),
+            Cell::CellFormulaNumber { f, .. } => Some(*f),
+            Cell::CellFormulaString { f, .. } => Some(*f),
+            Cell::CellFormulaError { f, .. } => Some(*f),
+            _ => None,
        }
    }

@@ -127,15 +89,6 @@ impl Cell {
            Cell::CellFormulaNumber { s, .. } => *s = style,
            Cell::CellFormulaString { s, .. } => *s = style,
            Cell::CellFormulaError { s, .. } => *s = style,
-            Cell::SpillBooleanCell { s, .. } => *s = style,
-            Cell::SpillNumberCell { s, .. } => *s = style,
-            Cell::SpillStringCell { s, .. } => *s = style,
-            Cell::SpillErrorCell { s, .. } => *s = style,
-            Cell::DynamicCellFormula { s, .. } => *s = style,
-            Cell::DynamicCellFormulaBoolean { s, .. } => *s = style,
-            Cell::DynamicCellFormulaNumber { s, .. } => *s = style,
-            Cell::DynamicCellFormulaString { s, .. } => *s = style,
-            Cell::DynamicCellFormulaError { s, .. } => *s = style,
        };
    }

@@ -151,15 +104,6 @@ impl Cell {
            Cell::CellFormulaNumber { s, .. } => *s,
            Cell::CellFormulaString { s, .. } => *s,
            Cell::CellFormulaError { s, .. } => *s,
-            Cell::SpillBooleanCell { s, .. } => *s,
-            Cell::SpillNumberCell { s, .. } => *s,
-            Cell::SpillStringCell { s, .. } => *s,
-            Cell::SpillErrorCell { s, .. } => *s,
-            Cell::DynamicCellFormula { s, .. } => *s,
-            Cell::DynamicCellFormulaBoolean { s, .. } => *s,
-            Cell::DynamicCellFormulaNumber { s, .. } => *s,
-            Cell::DynamicCellFormulaString { s, .. } => *s,
-            Cell::DynamicCellFormulaError { s, .. } => *s,
        }
    }

@@ -175,15 +119,6 @@ impl Cell {
            Cell::CellFormulaNumber { .. } => CellType::Number,
            Cell::CellFormulaString { .. } => CellType::Text,
            Cell::CellFormulaError { .. } => CellType::ErrorValue,
-            Cell::SpillBooleanCell { .. } => CellType::LogicalValue,
-            Cell::SpillNumberCell { .. } => CellType::Number,
-            Cell::SpillStringCell { .. } => CellType::Text,
-            Cell::SpillErrorCell { .. } => CellType::ErrorValue,
-            Cell::DynamicCellFormula { .. } => CellType::Number,
-            Cell::DynamicCellFormulaBoolean { .. } => CellType::LogicalValue,
-            Cell::DynamicCellFormulaNumber { .. } => CellType::Number,
-            Cell::DynamicCellFormulaString { .. } => CellType::Text,
-            Cell::DynamicCellFormulaError { .. } => CellType::ErrorValue,
        }
    }

@@ -201,7 +136,7 @@ impl Cell {
            Cell::EmptyCell { .. } => CellValue::None,
            Cell::BooleanCell { v, s: _ } => CellValue::Boolean(*v),
            Cell::NumberCell { v, s: _ } => CellValue::Number(*v),
-            Cell::ErrorCell { ei, .. } | Cell::SpillErrorCell { ei, .. } => {
+            Cell::ErrorCell { ei, .. } => {
                let v = ei.to_localized_error_string(language);
                CellValue::String(v)
            }
@@ -213,25 +148,14 @@ impl Cell {
                };
                CellValue::String(v)
            }
-            Cell::DynamicCellFormula { .. } | Cell::CellFormula { .. } => {
-                CellValue::String("#ERROR!".to_string())
-            }
-            Cell::DynamicCellFormulaBoolean { v, .. } | Cell::CellFormulaBoolean { v, .. } => {
-                CellValue::Boolean(*v)
-            }
-            Cell::DynamicCellFormulaNumber { v, .. } | Cell::CellFormulaNumber { v, .. } => {
-                CellValue::Number(*v)
-            }
-            Cell::DynamicCellFormulaString { v, .. } | Cell::CellFormulaString { v, .. } => {
-                CellValue::String(v.clone())
-            }
-            Cell::DynamicCellFormulaError { ei, .. } | Cell::CellFormulaError { ei, .. } => {
+            Cell::CellFormula { .. } => CellValue::String("#ERROR!".to_string()),
+            Cell::CellFormulaBoolean { v, .. } => CellValue::Boolean(*v),
+            Cell::CellFormulaNumber { v, .. } => CellValue::Number(*v),
+            Cell::CellFormulaString { v, .. } => CellValue::String(v.clone()),
+            Cell::CellFormulaError { ei, .. } => {
                let v = ei.to_localized_error_string(language);
                CellValue::String(v)
            }
-            Cell::SpillBooleanCell { v, .. } => CellValue::Boolean(*v),
-            Cell::SpillNumberCell { v, .. } => CellValue::Number(*v),
-            Cell::SpillStringCell { v, .. } => CellValue::String(v.clone()),
        }
    }

--- a/base/src/expressions/parser/mod.rs
+++ b/base/src/expressions/parser/mod.rs
@@ -717,7 +717,7 @@ impl Parser {
                        return Node::ParseErrorKind {
                            formula: self.lexer.get_formula(),
                            position: 0,
-                            message: "sheet not found".to_string(),
+                            message: format!("sheet not found: {}", context.sheet),
                        };
                    }
                };
@@ -850,7 +850,7 @@ impl Parser {
                        return Node::ParseErrorKind {
                            formula: self.lexer.get_formula(),
                            position: 0,
-                            message: "sheet not found".to_string(),
+                            message: format!("sheet not found: {}", context.sheet),
                        };
                    }
                };
@@ -878,7 +878,7 @@ impl Parser {
                        return Node::ParseErrorKind {
                            formula: self.lexer.get_formula(),
                            position: 0,
-                            message: "sheet not found".to_string(),
+                            message: format!("table sheet not found: {}", table.sheet_name),
                        };
                    }
                };
--- a/base/src/expressions/parser/static_analysis.rs
+++ b/base/src/expressions/parser/static_analysis.rs
@@ -186,8 +186,7 @@ pub fn add_implicit_intersection(node: &mut Node, add: bool) {
    };
 }

-#[derive(Clone)]
-pub enum StaticResult {
+pub(crate) enum StaticResult {
    Scalar,
    Array(i32, i32),
    Range(i32, i32),
@@ -223,7 +222,7 @@ fn static_analysis_op_nodes(left: &Node, right: &Node) -> StaticResult {
 //  * Array(a, b) if we know it will be an a x b array.
 //  * Range(a, b) if we know it will be a a x b range.
 //  * Unknown if we cannot guaranty either
-pub(crate) fn run_static_analysis_on_node(node: &Node) -> StaticResult {
+fn run_static_analysis_on_node(node: &Node) -> StaticResult {
    match node {
        Node::BooleanKind(_)
        | Node::NumberKind(_)
--- a/base/src/functions/logical.rs
+++ b/base/src/functions/logical.rs
@@ -246,7 +246,7 @@ impl Model {
        }
        // None of the cases matched so we return the default
        // If there is an even number of args is the last one otherwise is #N/A
-        if args_count % 2 == 0 {
+        if args_count.is_multiple_of(2) {
            return self.evaluate_node_in_context(&args[args_count - 1], cell);
        }
        CalcResult::Error {
@@ -262,7 +262,7 @@ impl Model {
        if args_count < 2 {
            return CalcResult::new_args_number_error(cell);
        }
-        if args_count % 2 != 0 {
+        if !args_count.is_multiple_of(2) {
            // Missing value for last condition
            return CalcResult::new_args_number_error(cell);
        }
--- a/base/src/functions/statistical.rs
+++ b/base/src/functions/statistical.rs
@@ -350,7 +350,7 @@ impl Model {
    // FIXME: This function shares a lot of code with apply_ifs. Can we merge them?
    pub(crate) fn fn_countifs(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
        let args_count = args.len();
-        if args_count < 2 || args_count % 2 == 1 {
+        if args_count < 2 || !args_count.is_multiple_of(2) {
            return CalcResult::new_args_number_error(cell);
        }

@@ -476,7 +476,7 @@ impl Model {
        F: FnMut(f64),
    {
        let args_count = args.len();
-        if args_count < 3 || args_count % 2 == 0 {
+        if args_count < 3 || args_count.is_multiple_of(2) {
            return Err(CalcResult::new_args_number_error(cell));
        }
        let arg_0 = self.evaluate_node_in_context(&args[0], cell);
--- a/base/src/functions/subtotal.rs
+++ b/base/src/functions/subtotal.rs
@@ -96,7 +96,7 @@ impl Model {

        match cell.get_formula() {
            Some(f) => {
-                let node = &self.parsed_formulas[sheet_index as usize][f as usize].0;
+                let node = &self.parsed_formulas[sheet_index as usize][f as usize];
                matches!(
                    node,
                    Node::FunctionKind {
--- a/base/src/model.rs
+++ b/base/src/model.rs
@@ -11,9 +11,8 @@ use crate::{
        lexer::LexerMode,
        parser::{
            move_formula::{move_formula, MoveContext},
-            static_analysis::{run_static_analysis_on_node, StaticResult},
            stringify::{rename_defined_name_in_node, to_rc_format, to_string},
-            ArrayNode, Node, Parser,
+            Node, Parser,
        },
        token::{get_error_by_name, Error, OpCompare, OpProduct, OpSum, OpUnary},
        types::*,
@@ -84,24 +83,6 @@ pub(crate) enum ParsedDefinedName {
    InvalidDefinedNameFormula,
 }

-/// A support node is either a cell or a range of cells
-pub(crate) enum SupportNode {
-    /// (sheet, row, column)
-    Cell((u32, i32, i32)),
-    /// (sheet, row, column, height, width)
-    Range((u32, i32, i32, u32, u32))
-}
-
-/// The state of the computation
-pub(crate) enum EvaluationState {
-    /// the model is ready for a new evaluation
-    Ready,
-    /// the model is evaluating cells that might spill
-    EvaluatingSpills,
-    /// the model is evaluating cells normally
-    Evaluating
-}
-
 /// A dynamical IronCalc model.
 ///
 /// Its is composed of a `Workbook`. Everything else are dynamical quantities:
@@ -118,13 +99,15 @@ pub struct Model {
    /// A Rust internal representation of an Excel workbook
    pub workbook: Workbook,
    /// A list of parsed formulas
-    pub parsed_formulas: Vec<Vec<(Node, StaticResult)>>,
+    pub parsed_formulas: Vec<Vec<Node>>,
    /// A list of parsed defined names
    pub(crate) parsed_defined_names: HashMap<(Option<u32>, String), ParsedDefinedName>,
    /// An optimization to lookup strings faster
    pub(crate) shared_strings: HashMap<String, usize>,
    /// An instance of the parser
    pub(crate) parser: Parser,
+    /// The list of cells with formulas that are evaluated or being evaluated
+    pub(crate) cells: HashMap<(u32, i32, i32), CellState>,
    /// The locale of the model
    pub(crate) locale: Locale,
    /// The language used
@@ -133,16 +116,6 @@ pub struct Model {
    pub(crate) tz: Tz,
    /// The view id. A view consists of a selected sheet and ranges.
    pub(crate) view_id: u32,
-    /// ** Runtime ***
-    /// The list of cells with formulas that are evaluated or being evaluated
-    pub(crate) cells: HashMap<(u32, i32, i32), CellState>,
-    /// The support graph. For a given cell (sheet, row, column) the list of cells and ranges that were requested
-    pub(crate) support_graph: HashMap<(u32, i32, i32), Vec<SupportNode>>,
-    /// If the model is in a switch state then spill cells in the indices should be switched and recalculation redone
-    pub(crate) switch_cells: Option<(i32, i32)>,
-    /// Stack of cells being evaluated
-    pub(crate) stack: Vec<(u32, i32, i32)>,
-    pub(crate) state: EvaluationState,
 }

 // FIXME: Maybe this should be the same as CellReference
@@ -549,203 +522,14 @@ impl Model {
        }
        Ok(format!("{}!{}{}", sheet.name, column, cell_reference.row))
    }
-
-    /// Sets sheet, target_row, target_column, (width, height), &v
-    #[allow(clippy::too_many_arguments)]
-    fn set_spill_cell_with_formula_value(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        r: (i32, i32),
-        v: &CalcResult,
-        s: i32,
-        f: i32,
-    ) -> Result<(), String> {
-        let new_cell = match v {
-            CalcResult::EmptyCell => Cell::DynamicCellFormulaNumber {
-                f,
-                v: 0.0,
-                s,
-                r,
-                a: false,
-            },
-            CalcResult::String(v) => Cell::DynamicCellFormulaString {
-                f,
-                v: v.clone(),
-                s,
-                r,
-                a: false,
-            },
-            CalcResult::Number(v) => Cell::DynamicCellFormulaNumber {
-                v: *v,
-                s,
-                r,
-                f,
-                a: false,
-            },
-            CalcResult::Boolean(b) => Cell::DynamicCellFormulaBoolean {
-                v: *b,
-                s,
-                r,
-                f,
-                a: false,
-            },
-            CalcResult::Error { error, .. } => Cell::DynamicCellFormulaError {
-                ei: error.clone(),
-                s,
-                r,
-                f,
-                a: false,
-                o: "".to_string(),
-                m: "".to_string(),
-            },
-
-            // These cannot happen
-            // FIXME: Maybe the type of get_cell_value should be different
-            CalcResult::Range { .. } | CalcResult::EmptyArg | CalcResult::Array(_) => {
-                Cell::DynamicCellFormulaError {
-                    ei: Error::ERROR,
-                    s,
-                    r,
-                    f,
-                    a: false,
-                    o: "".to_string(),
-                    m: "".to_string(),
-                }
-            }
-        };
-        let sheet_data = &mut self.workbook.worksheet_mut(sheet)?.sheet_data;
-
-        match sheet_data.get_mut(&row) {
-            Some(column_data) => match column_data.get(&column) {
-                Some(_cell) => {
-                    column_data.insert(column, new_cell);
-                }
-                None => {
-                    column_data.insert(column, new_cell);
-                }
-            },
-            None => {
-                let mut column_data = HashMap::new();
-                column_data.insert(column, new_cell);
-                sheet_data.insert(row, column_data);
-            }
-        }
-        Ok(())
-    }
-
-    /// Sets a cell with a "spill" value
-    fn set_spill_cell_with_value(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        m: (i32, i32),
-        v: &CalcResult,
-    ) -> Result<(), String> {
-        let style_index = self.get_cell_style_index(sheet, row, column)?;
-        let new_style_index = if self.workbook.styles.style_is_quote_prefix(style_index) {
-            self.workbook
-                .styles
-                .get_style_without_quote_prefix(style_index)?
-        } else {
-            style_index
-        };
-        let new_cell = match v {
-            CalcResult::EmptyCell => Cell::SpillNumberCell {
-                v: 0.0,
-                s: style_index,
-                m,
-            },
-            CalcResult::String(s) => Cell::SpillStringCell {
-                v: s.clone(),
-                s: new_style_index,
-                m,
-            },
-            CalcResult::Number(f) => Cell::SpillNumberCell {
-                v: *f,
-                s: new_style_index,
-                m,
-            },
-            CalcResult::Boolean(b) => Cell::SpillBooleanCell {
-                v: *b,
-                s: new_style_index,
-                m,
-            },
-            CalcResult::Error { error, .. } => Cell::SpillErrorCell {
-                ei: error.clone(),
-                s: style_index,
-                m,
-            },
-
-            // These cannot happen
-            // FIXME: Maybe the type of get_cell_value should be different
-            CalcResult::Range { .. } | CalcResult::EmptyArg | CalcResult::Array(_) => {
-                Cell::SpillErrorCell {
-                    ei: Error::ERROR,
-                    s: style_index,
-                    m,
-                }
-            }
-        };
-        let sheet_data = &mut self.workbook.worksheet_mut(sheet)?.sheet_data;
-
-        match sheet_data.get_mut(&row) {
-            Some(column_data) => match column_data.get(&column) {
-                Some(_cell) => {
-                    column_data.insert(column, new_cell);
-                }
-                None => {
-                    column_data.insert(column, new_cell);
-                }
-            },
-            None => {
-                let mut column_data = HashMap::new();
-                column_data.insert(column, new_cell);
-                sheet_data.insert(row, column_data);
-            }
-        }
-        Ok(())
-    }
-
-    /// Returns `None` if no cell has called this cell, otherwise returns the dependent cell
-    fn get_support_cell(&self, sheet: u32, row: i32, column: i32) -> Result<Option<&Cell>, String> {
-        self.workbook.supporting_cells.get(&(sheet, row, column)).map(|c| Some(c)).ok_or_else(|| "Cell not found".into())
-    }
-
    /// Sets `result` in the cell given by `sheet` sheet index, row and column
    /// Note that will panic if the cell does not exist
    /// It will do nothing if the cell does not have a formula
-    /// If the cell is an array or a range it will check if it is possible to spill to other cells
-    /// if it is not it will return an error.
-    /// Then it will check if any of the cells has been requested before.
    #[allow(clippy::expect_used)]
-    fn set_cell_value(
-        &mut self,
-        cell_reference: CellReferenceIndex,
-        result: &CalcResult,
-    ) -> Result<(), String> {
+    fn set_cell_value(&mut self, cell_reference: CellReferenceIndex, result: &CalcResult) {
        let CellReferenceIndex { sheet, column, row } = cell_reference;
-        let cell = self
-            .workbook
-            .worksheet(sheet)?
-            .cell(row, column)
-            .cloned()
-            .unwrap_or_default();
+        let cell = &self.workbook.worksheets[sheet as usize].sheet_data[&row][&column];
        let s = cell.get_style();
-        // If the cell is a dynamic cell we need to delete all the cells in the range
-        if let Some((width, height)) = cell.get_dynamic_range() {
-            for r in row..row + height {
-                for c in column..column + width {
-                    // skip the "mother" cell
-                    if r == row && c == column {
-                        continue;
-                    }
-                    self.cell_clear_contents(sheet, r, c)?;
-                }
-            }
-        }
        if let Some(f) = cell.get_formula() {
            match result {
                CalcResult::Number(value) => {
@@ -810,145 +594,19 @@ impl Model {
                        ei: error.clone(),
                    };
                }
-                CalcResult::EmptyCell | CalcResult::EmptyArg => {
-                    *self.workbook.worksheets[sheet as usize]
-                        .sheet_data
-                        .get_mut(&row)
-                        .expect("expected a row")
-                        .get_mut(&column)
-                        .expect("expected a column") = Cell::CellFormulaNumber { f, s, v: 0.0 };
-                }
                CalcResult::Range { left, right } => {
                    if left.sheet == right.sheet
                        && left.row == right.row
                        && left.column == right.column
                    {
-                        // There is only one cell
-                        let single_cell = CellReferenceIndex {
+                        let intersection_cell = CellReferenceIndex {
                            sheet: left.sheet,
                            column: left.column,
                            row: left.row,
                        };
-                        let v = self.evaluate_cell(single_cell);
-                        self.set_cell_value(cell_reference, &v)?;
+                        let v = self.evaluate_cell(intersection_cell);
+                        self.set_cell_value(cell_reference, &v);
                    } else {
-                        // We need to check if all the cells are empty, otherwise we mark the cell as #SPILL!
-                        let mut all_empty = true;
-                        for r in row..=row + right.row - left.row {
-                            for c in column..=column + right.column - left.column {
-                                if r == row && c == column {
-                                    // skip the "mother" cell
-                                    continue;
-                                }
-                                if !self.is_empty_cell(sheet, r, c).unwrap_or(false) {
-                                    all_empty = false;
-                                    break;
-                                }
-                                if let Some(support) = self.get_support_cell(sheet, r, c) {
-                                    all_empty = false;
-                                }
-                            }
-                            if !all_empty {
-                                break;
-                            }
-                        }
-                        if !all_empty {
-                            let o = match self.cell_reference_to_string(&cell_reference) {
-                                Ok(s) => s,
-                                Err(_) => "".to_string(),
-                            };
-                            *self.workbook.worksheets[sheet as usize]
-                                .sheet_data
-                                .get_mut(&row)
-                                .expect("expected a row")
-                                .get_mut(&column)
-                                .expect("expected a column") = Cell::DynamicCellFormulaError {
-                                f,
-                                s,
-                                o,
-                                m: "Result would spill to non empty cells".to_string(),
-                                ei: Error::SPILL,
-                                r: (1, 1),
-                                a: false,
-                            };
-                            return Ok(());
-                        }
-                        // evaluate all the cells in that range
-                        for r in left.row..=right.row {
-                            for c in left.column..=right.column {
-                                let cell_reference = CellReferenceIndex {
-                                    sheet: left.sheet,
-                                    row: r,
-                                    column: c,
-                                };
-                                // FIXME: We ned to return an error
-                                self.evaluate_cell(cell_reference);
-                            }
-                        }
-                        // now write the result in the target
-                        for r in left.row..=right.row {
-                            let row_delta = r - left.row;
-                            for c in left.column..=right.column {
-                                let column_delta = c - left.column;
-                                // We need to put whatever is in (left.sheet, r, c) in
-                                // (sheet, row + row_delta, column + column_delta)
-                                // But we need to preserve the style
-                                let target_row = row + row_delta;
-                                let target_column = column + column_delta;
-                                let cell = self
-                                    .workbook
-                                    .worksheet(left.sheet)?
-                                    .cell(r, c)
-                                    .cloned()
-                                    .unwrap_or_default();
-                                let cell_reference = CellReferenceIndex {
-                                    sheet: left.sheet,
-                                    row: r,
-                                    column: c,
-                                };
-                                let v = self.get_cell_value(&cell, cell_reference);
-                                if row == target_row && column == target_column {
-                                    // let cell_reference = CellReferenceIndex { sheet, row, column };
-                                    // self.set_cell_value(cell_reference, &v);
-                                    self.set_spill_cell_with_formula_value(
-                                        sheet,
-                                        target_row,
-                                        target_column,
-                                        (right.column - left.column + 1, right.row - left.row + 1),
-                                        &v,
-                                        s,
-                                        f,
-                                    )?;
-                                    continue;
-                                }
-                                self.set_spill_cell_with_value(
-                                    sheet,
-                                    target_row,
-                                    target_column,
-                                    (row, column),
-                                    &v,
-                                )?;
-                            }
-                        }
-                    }
-                }
-                CalcResult::Array(array) => {
-                    let width = array[0].len() as i32;
-                    let height = array.len() as i32;
-                    // First we check that we don't spill:
-                    let mut all_empty = true;
-                    for r in row..row + height {
-                        for c in column..column + width {
-                            if r == row && c == column {
-                                continue;
-                            }
-                            if !self.is_empty_cell(sheet, r, c).unwrap_or(false) {
-                                all_empty = false;
-                                break;
-                            }
-                        }
-                    }
-                    if !all_empty {
                        let o = match self.cell_reference_to_string(&cell_reference) {
                            Ok(s) => s,
                            Err(_) => "".to_string(),
@@ -962,65 +620,57 @@ impl Model {
                            f,
                            s,
                            o,
-                            m: "Result would spill to non empty cells".to_string(),
-                            ei: Error::SPILL,
+                            m: "Implicit Intersection not implemented".to_string(),
+                            ei: Error::NIMPL,
                        };
-                        return Ok(());
-                    }
-                    let mut target_row = row;
-                    for data_row in array {
-                        let mut target_column = column;
-                        for value in data_row {
-                            if row == target_row && column == target_column {
-                                // This is the root cell of the dynamic array
-                                let cell_reference = CellReferenceIndex { sheet, row, column };
-                                let v = match value {
-                                    ArrayNode::Boolean(b) => CalcResult::Boolean(*b),
-                                    ArrayNode::Number(f) => CalcResult::Number(*f),
-                                    ArrayNode::String(s) => CalcResult::String(s.clone()),
-                                    ArrayNode::Error(error) => CalcResult::new_error(
-                                        error.clone(),
-                                        cell_reference,
-                                        error.to_localized_error_string(&self.language),
-                                    ),
-                                };
-                                self.set_spill_cell_with_formula_value(
-                                    sheet,
-                                    target_row,
-                                    target_column,
-                                    (width, height),
-                                    &v,
-                                    s,
-                                    f,
-                                )?;
-                                target_column += 1;
-                                continue;
-                            }
-                            let v = match value {
-                                ArrayNode::Boolean(b) => CalcResult::Boolean(*b),
-                                ArrayNode::Number(f) => CalcResult::Number(*f),
-                                ArrayNode::String(s) => CalcResult::String(s.clone()),
-                                ArrayNode::Error(error) => CalcResult::new_error(
-                                    error.clone(),
-                                    cell_reference,
-                                    error.to_localized_error_string(&self.language),
-                                ),
-                            };
-                            self.set_spill_cell_with_value(
-                                sheet,
-                                target_row,
-                                target_column,
-                                (row, column),
-                                &v,
-                            )?;
-                            target_column += 1;
-                        }
-                        target_row += 1;
                    }
+                    // if let Some(intersection_cell) = implicit_intersection(&cell_reference, &range)
+                    // {
+                    //     let v = self.evaluate_cell(intersection_cell);
+                    //     self.set_cell_value(cell_reference, &v);
+                    // } else {
+                    //     let o = match self.cell_reference_to_string(&cell_reference) {
+                    //         Ok(s) => s,
+                    //         Err(_) => "".to_string(),
+                    //     };
+                    //     *self.workbook.worksheets[sheet as usize]
+                    //         .sheet_data
+                    //         .get_mut(&row)
+                    //         .expect("expected a row")
+                    //         .get_mut(&column)
+                    //         .expect("expected a column") = Cell::CellFormulaError {
+                    //         f,
+                    //         s,
+                    //         o,
+                    //         m: "Invalid reference".to_string(),
+                    //         ei: Error::VALUE,
+                    //     };
+                    // }
+                }
+                CalcResult::EmptyCell | CalcResult::EmptyArg => {
+                    *self.workbook.worksheets[sheet as usize]
+                        .sheet_data
+                        .get_mut(&row)
+                        .expect("expected a row")
+                        .get_mut(&column)
+                        .expect("expected a column") = Cell::CellFormulaNumber { f, s, v: 0.0 };
+                }
+                CalcResult::Array(_) => {
+                    *self.workbook.worksheets[sheet as usize]
+                        .sheet_data
+                        .get_mut(&row)
+                        .expect("expected a row")
+                        .get_mut(&column)
+                        .expect("expected a column") = Cell::CellFormulaError {
+                        f,
+                        s,
+                        o: "".to_string(),
+                        m: "Arrays not supported yet".to_string(),
+                        ei: Error::NIMPL,
+                    };
                }
            }
        }
-        Ok(())
    }

    /// Sets the color of the sheet tab.
@@ -1064,18 +714,16 @@ impl Model {
        Ok(())
    }

-    // EmptyCell, Boolean, Number, String, Error
    fn get_cell_value(&self, cell: &Cell, cell_reference: CellReferenceIndex) -> CalcResult {
        use Cell::*;
        match cell {
            EmptyCell { .. } => CalcResult::EmptyCell,
-            BooleanCell { v, .. } | SpillBooleanCell { v, .. } => CalcResult::Boolean(*v),
-            NumberCell { v, .. } | SpillNumberCell { v, .. } => CalcResult::Number(*v),
-            ErrorCell { ei, .. } | SpillErrorCell { ei, .. } => {
+            BooleanCell { v, .. } => CalcResult::Boolean(*v),
+            NumberCell { v, .. } => CalcResult::Number(*v),
+            ErrorCell { ei, .. } => {
                let message = ei.to_localized_error_string(&self.language);
                CalcResult::new_error(ei.clone(), cell_reference, message)
            }
-            SpillStringCell { v, .. } => CalcResult::String(v.clone()),
            SharedString { si, .. } => {
                if let Some(s) = self.workbook.shared_strings.get(*si as usize) {
                    CalcResult::String(s.clone())
@@ -1084,21 +732,15 @@ impl Model {
                    CalcResult::new_error(Error::ERROR, cell_reference, message)
                }
            }
-            DynamicCellFormula { .. } | CellFormula { .. } => CalcResult::Error {
+            CellFormula { .. } => CalcResult::Error {
                error: Error::ERROR,
                origin: cell_reference,
                message: "Unevaluated formula".to_string(),
            },
-            DynamicCellFormulaBoolean { v, .. } | CellFormulaBoolean { v, .. } => {
-                CalcResult::Boolean(*v)
-            }
-            DynamicCellFormulaNumber { v, .. } | CellFormulaNumber { v, .. } => {
-                CalcResult::Number(*v)
-            }
-            DynamicCellFormulaString { v, .. } | CellFormulaString { v, .. } => {
-                CalcResult::String(v.clone())
-            }
-            DynamicCellFormulaError { ei, o, m, .. } | CellFormulaError { ei, o, m, .. } => {
+            CellFormulaBoolean { v, .. } => CalcResult::Boolean(*v),
+            CellFormulaNumber { v, .. } => CalcResult::Number(*v),
+            CellFormulaString { v, .. } => CalcResult::String(v.clone()),
+            CellFormulaError { ei, o, m, .. } => {
                if let Some(cell_reference) = self.parse_reference(o) {
                    CalcResult::new_error(ei.clone(), cell_reference, m.clone())
                } else {
@@ -1130,8 +772,6 @@ impl Model {
        self.workbook.worksheet(sheet)?.is_empty_cell(row, column)
    }

-    /// Evaluates the cell. After the evaluation is done puts the value in the cell and other cells if it spills.
-    /// If when writing a spill cell encounter a cell whose value has been requested marks the model as "dirty"
    pub(crate) fn evaluate_cell(&mut self, cell_reference: CellReferenceIndex) -> CalcResult {
        let row_data = match self.workbook.worksheets[cell_reference.sheet as usize]
            .sheet_data
@@ -1170,10 +810,9 @@ impl Model {
                        self.cells.insert(key, CellState::Evaluating);
                    }
                }
-                let (node, _static_result) =
-                    &self.parsed_formulas[cell_reference.sheet as usize][f as usize];
-                let result = self.evaluate_node_in_context(&node.clone(), cell_reference);
-                let _ = self.set_cell_value(cell_reference, &result);
+                let node = &self.parsed_formulas[cell_reference.sheet as usize][f as usize].clone();
+                let result = self.evaluate_node_in_context(node, cell_reference);
+                self.set_cell_value(cell_reference, &result);
                // mark cell as evaluated
                self.cells.insert(key, CellState::Evaluated);
                result
@@ -1283,10 +922,6 @@ impl Model {
            locale,
            tz,
            view_id: 0,
-            support_graph: HashMap::new(),
-            switch_cells: None,
-            stack: Vec::new(),
-            state: EvaluationState::Ready,
        };

        model.parse_formulas();
@@ -1465,8 +1100,7 @@ impl Model {
            Some(cell) => match cell.get_formula() {
                None => cell.get_text(&self.workbook.shared_strings, &self.language),
                Some(i) => {
-                    let (formula, static_result) =
-                        &self.parsed_formulas[sheet as usize][i as usize];
+                    let formula = &self.parsed_formulas[sheet as usize][i as usize];
                    let cell_ref = CellReferenceRC {
                        sheet: self.workbook.worksheets[sheet as usize].get_name(),
                        row: target_row,
@@ -1569,8 +1203,7 @@ impl Model {
                        .get(sheet as usize)
                        .ok_or("missing sheet")?
                        .get(formula_index as usize)
-                        .ok_or("missing formula")?
-                        .0;
+                        .ok_or("missing formula")?;
                    let cell_ref = CellReferenceRC {
                        sheet: worksheet.get_name(),
                        row,
@@ -1804,25 +1437,6 @@ impl Model {
        column: i32,
        value: String,
    ) -> Result<(), String> {
-        // We need to check if the cell is part of a dynamic array
-        let cell = self
-            .workbook
-            .worksheet(sheet)?
-            .cell(row, column)
-            .cloned()
-            .unwrap_or_default();
-        // If the cell is a dynamic cell we need to delete all the cells in the range
-        if let Some((width, height)) = cell.get_dynamic_range() {
-            for r in row..row + height {
-                for c in column..column + width {
-                    // skip the "mother" cell
-                    if r == row && c == column {
-                        continue;
-                    }
-                    self.cell_clear_contents(sheet, r, c)?;
-                }
-            }
-        }
        // If value starts with "'" then we force the style to be quote_prefix
        let style_index = self.get_cell_style_index(sheet, row, column)?;
        if let Some(new_value) = value.strip_prefix('\'') {
@@ -1848,9 +1462,8 @@ impl Model {
                    self.set_cell_with_formula(sheet, row, column, formula, new_style_index)?;
                // Update the style if needed
                let cell = CellReferenceIndex { sheet, row, column };
-                let (parsed_formula, static_result) =
-                    self.parsed_formulas[sheet as usize][formula_index as usize].clone();
-                if let Some(units) = self.compute_node_units(&parsed_formula, &cell) {
+                let parsed_formula = &self.parsed_formulas[sheet as usize][formula_index as usize];
+                if let Some(units) = self.compute_node_units(parsed_formula, &cell) {
                    let new_style_index = self
                        .workbook
                        .styles
@@ -1858,14 +1471,6 @@ impl Model {
                    let style = self.workbook.styles.get_style(new_style_index)?;
                    self.set_cell_style(sheet, row, column, &style)?
                }
-                match static_result {
-                    StaticResult::Scalar => {}
-                    StaticResult::Array(_, _)
-                    | StaticResult::Range(_, _)
-                    | StaticResult::Unknown => {
-                        self.workbook.spill_cells.push((sheet, row, column));
-                    }
-                }
            } else {
                // The list of currencies is '$', '€' and the local currency
                let mut currencies = vec!["$", "€"];
@@ -1939,7 +1544,6 @@ impl Model {
                _ => parsed_formula = new_parsed_formula,
            }
        }
-        let static_result = run_static_analysis_on_node(&parsed_formula);

        let s = to_rc_format(&parsed_formula);
        let mut formula_index: i32 = -1;
@@ -1948,7 +1552,7 @@ impl Model {
        }
        if formula_index == -1 {
            shared_formulas.push(s);
-            self.parsed_formulas[sheet as usize].push((parsed_formula, static_result));
+            self.parsed_formulas[sheet as usize].push(parsed_formula);
            formula_index = (shared_formulas.len() as i32) - 1;
        }
        worksheet.set_cell_with_formula(row, column, formula_index, style)?;
@@ -2143,7 +1747,7 @@ impl Model {
        };
        match cell.get_formula() {
            Some(formula_index) => {
-                let formula = &self.parsed_formulas[sheet as usize][formula_index as usize].0;
+                let formula = &self.parsed_formulas[sheet as usize][formula_index as usize];
                let cell_ref = CellReferenceRC {
                    sheet: worksheet.get_name(),
                    row,
@@ -2179,34 +1783,9 @@ impl Model {

    /// Evaluates the model with a top-down recursive algorithm
    pub fn evaluate(&mut self) {
-        // We first evaluate all the cells that might spill to other cells
-        let mut spills_computed = false;
-        self.state = EvaluationState::EvaluatingSpills;
-        while !spills_computed {
-            spills_computed = true;
-            // clear all computation artifacts
-            self.cells.clear();
-            // Evaluate all the cells that might spill
-            let spill_cells = self.workbook.spill_cells.clone();
-            for (sheet, row, column) in spill_cells {
-                self.evaluate_cell(CellReferenceIndex { sheet, row, column });
-                if self.switch_cells.is_some() {
-                    spills_computed = false;
-                    break;
-                }
-            }
-            if let Some((index1, index2)) = self.switch_cells {
-                spills_computed = false;
-                // switch the cells indices in the spill_cells
-                let cell1 = self.workbook.spill_cells[index1 as usize];
-                let cell2 = self.workbook.spill_cells[index2 as usize];
-                self.workbook.spill_cells[index1 as usize] = cell2;
-                self.workbook.spill_cells[index2 as usize] = cell1;
-            }
-        }
-        self.state = EvaluationState::Evaluating;
+        // clear all computation artifacts
+        self.cells.clear();

-        // Now we compute all the rest
        let cells = self.get_all_cells();

        for cell in cells {
@@ -2216,7 +1795,6 @@ impl Model {
                column: cell.column,
            });
        }
-        self.state = EvaluationState::Ready;
    }

    /// Removes the content of the cell but leaves the style.
@@ -2240,22 +1818,9 @@ impl Model {
    /// # }
    /// ```
    pub fn cell_clear_contents(&mut self, sheet: u32, row: i32, column: i32) -> Result<(), String> {
-        // If it has a spill formula we need to delete the contents of all the spilled cells
-        let worksheet = self.workbook.worksheet_mut(sheet)?;
-        if let Some(cell) = worksheet.cell(row, column) {
-            if let Some((width, height)) = cell.get_dynamic_range() {
-                for r in row..row + height {
-                    for c in column..column + width {
-                        if row == r && column == c {
-                            // we skip the root cell
-                            continue;
-                        }
-                        worksheet.cell_clear_contents(r, c)?;
-                    }
-                }
-            }
-        }
-        worksheet.cell_clear_contents(row, column)?;
+        self.workbook
+            .worksheet_mut(sheet)?
+            .cell_clear_contents(row, column)?;
        Ok(())
    }

@@ -2280,18 +1845,6 @@ impl Model {
    /// # }
    pub fn cell_clear_all(&mut self, sheet: u32, row: i32, column: i32) -> Result<(), String> {
        let worksheet = self.workbook.worksheet_mut(sheet)?;
-        // Delete the contents of spilled cells if any
-        if let Some(cell) = worksheet.cell(row, column) {
-            if let Some((width, height)) = cell.get_dynamic_range() {
-                for r in row..row + height {
-                    for c in column..column + width {
-                        if row == r && c == column {
-                            worksheet.cell_clear_contents(r, c)?;
-                        }
-                    }
-                }
-            }
-        }

        let sheet_data = &mut worksheet.sheet_data;
        if let Some(row_data) = sheet_data.get_mut(&row) {
--- a/base/src/new_empty.rs
+++ b/base/src/new_empty.rs
@@ -8,7 +8,6 @@ use crate::{
    expressions::{
        lexer::LexerMode,
        parser::{
-            static_analysis::run_static_analysis_on_node,
            stringify::{rename_sheet_in_node, to_rc_format, to_string},
            Parser,
        },
@@ -16,7 +15,7 @@ use crate::{
    },
    language::get_language,
    locale::get_locale,
-    model::{get_milliseconds_since_epoch, EvaluationState, Model, ParsedDefinedName},
+    model::{get_milliseconds_since_epoch, Model, ParsedDefinedName},
    types::{
        DefinedName, Metadata, SheetState, Workbook, WorkbookSettings, WorkbookView, Worksheet,
        WorksheetView,
@@ -95,8 +94,7 @@ impl Model {
            let mut parse_formula = Vec::new();
            for formula in shared_formulas {
                let t = self.parser.parse(formula, &cell_reference);
-                let static_result = run_static_analysis_on_node(&t);
-                parse_formula.push((t, static_result));
+                parse_formula.push(t);
            }
            self.parsed_formulas.push(parse_formula);
        }
@@ -407,7 +405,6 @@ impl Model {
            },
            tables: HashMap::new(),
            views,
-            spill_cells: Vec::new(),
        };
        let parsed_formulas = Vec::new();
        let worksheets = &workbook.worksheets;
@@ -430,10 +427,6 @@ impl Model {
            language,
            tz,
            view_id: 0,
-            support_graph: HashMap::new(),
-            switch_cells: None,
-            stack: Vec::new(),
-            state: EvaluationState::Ready,
        };
        model.parse_formulas();
        Ok(model)
--- a/base/src/test/mod.rs
+++ b/base/src/test/mod.rs
@@ -52,7 +52,6 @@ mod test_fn_offset;
 mod test_number_format;

 mod test_arrays;
-mod test_dynamic_arrays;
 mod test_escape_quotes;
 mod test_extend;
 mod test_fn_fv;
--- a/base/src/test/test_dynamic_arrays.rs
+++ b/base/src/test/test_dynamic_arrays.rs
@@ -1,50 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::test::util::new_empty_model;
-
-#[test]
-fn they_spill() {
-    let mut model = new_empty_model();
-    model._set("A1", "42");
-    model._set("A2", "5");
-    model._set("A3", "7");
-
-    model._set("B1", "=A1:A3");
-
-    model.evaluate();
-
-    assert_eq!(model._get_text("B1"), *"42");
-    assert_eq!(model._get_text("B2"), *"5");
-    assert_eq!(model._get_text("B3"), *"7");
-}
-
-#[test]
-fn spill_error() {
-    let mut model = new_empty_model();
-    model._set("A1", "42");
-    model._set("A2", "5");
-    model._set("A3", "7");
-
-    model._set("B1", "=A1:A3");
-    model._set("B2", "4");
-
-    model.evaluate();
-
-    assert_eq!(model._get_text("B1"), *"#SPILL!");
-    assert_eq!(model._get_text("B2"), *"4");
-    assert_eq!(model._get_text("B3"), *"");
-}
-
-#[test]
-fn second_evaluation() {
-    let mut model = new_empty_model();
-    model._set("C3", "={1,2,3}");
-    model.evaluate();
-
-    assert_eq!(model._get_text("D3"), "2");
-
-    model._set("D8", "23");
-    model.evaluate();
-
-    assert_eq!(model._get_text("D3"), "2");
-}
--- a/base/src/test/test_fn_or_xor.rs
+++ b/base/src/test/test_fn_or_xor.rs
@@ -91,12 +91,12 @@ fn fn_or_xor() {
        model._set("A10", &format!("={func}(X99:Z99"));

        // Reference to cell with reference to empty range
-        model._set("B11", "=@X99:Z99");
+        model._set("B11", "=X99:Z99");
        model._set("A11", &format!("={func}(B11)"));

        // Reference to cell with non-empty range
        model._set("X12", "1");
-        model._set("B12", "=@X12:Z12");
+        model._set("B12", "=X12:Z12");
        model._set("A12", &format!("={func}(B12)"));

        // Reference to text cell
--- a/base/src/test/test_implicit_intersection.rs
+++ b/base/src/test/test_implicit_intersection.rs
@@ -3,7 +3,7 @@
 use crate::test::util::new_empty_model;

 #[test]
-fn simple_column() {
+fn simple_colum() {
    let mut model = new_empty_model();
    // We populate cells A1 to A3
    model._set("A1", "1");
@@ -30,7 +30,7 @@ fn return_of_array_is_n_impl() {

    model.evaluate();

-    assert_eq!(model._get_text("C2"), "1".to_string());
+    assert_eq!(model._get_text("C2"), "#N/IMPL!".to_string());
    assert_eq!(model._get_text("D2"), "1.89188842".to_string());
 }

--- a/base/src/test/user_model/mod.rs
+++ b/base/src/test/user_model/mod.rs
@@ -6,10 +6,8 @@ mod test_border;
 mod test_clear_cells;
 mod test_column_style;
 mod test_defined_names;
-mod test_delete_evaluates;
 mod test_delete_row_column_formatting;
 mod test_diff_queue;
-mod test_dynamic_array;
 mod test_evaluation;
 mod test_general;
 mod test_grid_lines;
--- a/base/src/test/user_model/test_delete_evaluates.rs
+++ b/base/src/test/user_model/test_delete_evaluates.rs
@@ -1,47 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::{expressions::types::Area, UserModel};
-
-#[test]
-fn clear_cell_contents_evaluates() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "42").unwrap();
-    model.set_user_input(0, 1, 2, "=A1").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("42".to_string())
-    );
-    model
-        .range_clear_contents(&Area {
-            sheet: 0,
-            row: 1,
-            column: 1,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-
-    assert_eq!(model.get_formatted_cell_value(0, 1, 2), Ok("0".to_string()));
-}
-
-#[test]
-fn clear_cell_all_evaluates() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "42").unwrap();
-    model.set_user_input(0, 1, 2, "=A1").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("42".to_string())
-    );
-    model
-        .range_clear_all(&Area {
-            sheet: 0,
-            row: 1,
-            column: 1,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-
-    assert_eq!(model.get_formatted_cell_value(0, 1, 2), Ok("0".to_string()));
-}
--- a/base/src/test/user_model/test_dynamic_array.rs
+++ b/base/src/test/user_model/test_dynamic_array.rs
@@ -1,130 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::{expressions::types::Area, UserModel};
-
-// Tests basic behavour.
-#[test]
-fn basic() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    // We put a value by the dynamic array to check the border conditions
-    model.set_user_input(0, 2, 1, "22").unwrap();
-    model.set_user_input(0, 1, 1, "={34,35,3}").unwrap();
-
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 1),
-        Ok("34".to_string())
-    );
-}
-
-// Test that overwriting a dynamic array with a single value dissolves the array
-#[test]
-fn sett_user_input_mother() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "={34,35,3}").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("35".to_string())
-    );
-    model.set_user_input(0, 1, 1, "123").unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 2), Ok("".to_string()));
-}
-
-#[test]
-fn set_user_input_sibling() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "={43,55,34}").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("55".to_string())
-    );
-    // This does nothing
-    model.set_user_input(0, 1, 2, "123").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("55".to_string())
-    );
-}
-
-#[test]
-fn basic_undo_redo() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "={34,35,3}").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("35".to_string())
-    );
-    model.undo().unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 2), Ok("".to_string()));
-    model.redo().unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 2),
-        Ok("35".to_string())
-    );
-}
-
-#[test]
-fn mixed_spills() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    // D9 => ={1,2,3}
-    model.set_user_input(0, 9, 4, "={34,35,3}").unwrap();
-    // F6 => ={1;2;3;4}
-    model.set_user_input(0, 6, 6, "={1;2;3;4}").unwrap();
-
-    // F6 should be #SPILL!
-    assert_eq!(
-        model.get_formatted_cell_value(0, 6, 6),
-        Ok("#SPILL!".to_string())
-    );
-
-    // We delete D9
-    model
-        .range_clear_contents(&Area {
-            sheet: 0,
-            row: 9,
-            column: 4,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-
-    // F6 should be 1
-    assert_eq!(model.get_formatted_cell_value(0, 6, 6), Ok("1".to_string()));
-
-    // Now we undo that
-    model.undo().unwrap();
-    // F6 should be #SPILL!
-    assert_eq!(
-        model.get_formatted_cell_value(0, 6, 6),
-        Ok("#SPILL!".to_string())
-    );
-}
-
-#[test]
-fn spill_order_d9_f6() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    // D9 => ={1,2,3}
-    model.set_user_input(0, 9, 4, "={34,35,3}").unwrap();
-    // F6 => ={1;2;3;4}
-    model.set_user_input(0, 6, 6, "={1;2;3;4}").unwrap();
-
-    // F6 should be #SPILL!
-    assert_eq!(
-        model.get_formatted_cell_value(0, 6, 6),
-        Ok("#SPILL!".to_string())
-    );
-}
-
-#[test]
-fn spill_order_f6_d9() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    // F6 => ={1;2;3;4}
-    model.set_user_input(0, 6, 6, "={1;2;3;4}").unwrap();
-    // D9 => ={1,2,3}
-    model.set_user_input(0, 9, 4, "={34,35,3}").unwrap();
-
-    // D9 should be #SPILL!
-    assert_eq!(
-        model.get_formatted_cell_value(0, 9, 4),
-        Ok("#SPILL!".to_string())
-    );
-}
--- a/base/src/types.rs
+++ b/base/src/types.rs
@@ -51,8 +51,6 @@ pub struct Workbook {
    pub metadata: Metadata,
    pub tables: HashMap<String, Table>,
    pub views: HashMap<u32, WorkbookView>,
-    /// The list of cells that spill in the order of evaluation
-    pub spill_cells: Vec<(u32, i32, i32)>,
 }

 /// A defined name. The `sheet_id` is the sheet index in case the name is local
@@ -161,17 +159,17 @@ pub enum CellType {
    CompoundData = 128,
 }

-/// Cell types
-/// s is always the style index of the cell
 #[derive(Encode, Decode, Debug, Clone, PartialEq)]
 pub enum Cell {
    EmptyCell {
        s: i32,
    },
+
    BooleanCell {
        v: bool,
        s: i32,
    },
+
    NumberCell {
        v: f64,
        s: i32,
@@ -183,7 +181,6 @@ pub enum Cell {
    },
    // Always a shared string
    SharedString {
-        // string index
        si: i32,
        s: i32,
    },
@@ -192,11 +189,13 @@ pub enum Cell {
        f: i32,
        s: i32,
    },
+
    CellFormulaBoolean {
        f: i32,
        v: bool,
        s: i32,
    },
+
    CellFormulaNumber {
        f: i32,
        v: f64,
@@ -208,9 +207,9 @@ pub enum Cell {
        v: String,
        s: i32,
    },
+
    CellFormulaError {
        f: i32,
-        // error index
        ei: Error,
        s: i32,
        // Origin: Sheet3!C4
@@ -218,81 +217,7 @@ pub enum Cell {
        // Error Message: "Not implemented function"
        m: String,
    },
-    // All Spill/dynamic cells have a boolean, a for array, if true it is an array formula
-    // Spill cells point to a mother cell (row, column)
-    SpillNumberCell {
-        v: f64,
-        s: i32,
-        // mother cell (row, column)
-        m: (i32, i32),
-    },
-    SpillBooleanCell {
-        v: bool,
-        s: i32,
-        // mother cell (row, column)
-        m: (i32, i32),
-    },
-    SpillErrorCell {
-        ei: Error,
-        s: i32,
-        // mother cell (row, column)
-        m: (i32, i32),
-    },
-    SpillStringCell {
-        v: String,
-        s: i32,
-        // mother cell (row, column)
-        m: (i32, i32),
-    },
-    // Dynamic cell formulas have a range (width, height)
-    DynamicCellFormula {
-        f: i32,
-        s: i32,
-        // range of the formula (width, height)
-        r: (i32, i32),
-        // true if the formula is a CSE formula
-        a: bool,
-    },
-    DynamicCellFormulaBoolean {
-        f: i32,
-        v: bool,
-        s: i32,
-        // range of the formula (width, height)
-        r: (i32, i32),
-        // true if the formula is a CSE formula
-        a: bool,
-    },
-    DynamicCellFormulaNumber {
-        f: i32,
-        v: f64,
-        s: i32,
-        // range of the formula (width, height)
-        r: (i32, i32),
-        // true if the formula is a CSE formula
-        a: bool,
-    },
-    DynamicCellFormulaString {
-        f: i32,
-        v: String,
-        s: i32,
-        // range of the formula (width, height)
-        r: (i32, i32),
-        // true if the formula is a CSE formula
-        a: bool,
-    },
-    DynamicCellFormulaError {
-        f: i32,
-        ei: Error,
-        s: i32,
-        // Cell origin of the error
-        o: String,
-        // Error message in text
-        m: String,
-        // range of the formula (width, height)
-        r: (i32, i32),
-        // true if the formula is a CSE formula
-        a: bool,
-    },
+    // TODO: Array formulas
 }

 impl Default for Cell {
--- a/base/src/user_model/common.rs
+++ b/base/src/user_model/common.rs
@@ -24,18 +24,6 @@ use crate::user_model::history::{
 };

 use super::border_utils::is_max_border;
-
-#[derive(Serialize, Deserialize)]
-pub enum CellArrayStructure {
-    // It s just a single cell
-    SingleCell,
-    // It is part o a dynamic array
-    // (mother_row, mother_column, width, height)
-    DynamicChild(i32, i32, i32, i32),
-    // Mother of a dynamic array (width, height)
-    DynamicMother(i32, i32),
-}
-
 /// Data for the clipboard
 pub type ClipboardData = HashMap<i32, HashMap<i32, ClipboardCell>>;

@@ -639,7 +627,6 @@ impl UserModel {
            }
        }
        self.push_diff_list(diff_list);
-        self.evaluate_if_not_paused();
        Ok(())
    }

@@ -669,7 +656,6 @@ impl UserModel {
            }
        }
        self.push_diff_list(diff_list);
-        self.evaluate_if_not_paused();
        Ok(())
    }

@@ -1755,65 +1741,6 @@ impl UserModel {
        Ok(None)
    }

-    /// Returns the geometric structure of a cell
-    pub fn get_cell_array_structure(
-        &self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-    ) -> Result<CellArrayStructure, String> {
-        let cell = self
-            .model
-            .workbook
-            .worksheet(sheet)?
-            .cell(row, column)
-            .cloned()
-            .unwrap_or_default();
-        match cell {
-            Cell::EmptyCell { .. }
-            | Cell::BooleanCell { .. }
-            | Cell::NumberCell { .. }
-            | Cell::ErrorCell { .. }
-            | Cell::SharedString { .. }
-            | Cell::CellFormula { .. }
-            | Cell::CellFormulaBoolean { .. }
-            | Cell::CellFormulaNumber { .. }
-            | Cell::CellFormulaString { .. }
-            | Cell::CellFormulaError { .. } => Ok(CellArrayStructure::SingleCell),
-            Cell::SpillNumberCell { m, .. }
-            | Cell::SpillBooleanCell { m, .. }
-            | Cell::SpillErrorCell { m, .. }
-            | Cell::SpillStringCell { m, .. } => {
-                let (m_row, m_column) = m;
-                let m_cell = self
-                    .model
-                    .workbook
-                    .worksheet(sheet)?
-                    .cell(m_row, m_column)
-                    .cloned()
-                    .unwrap_or_default();
-                let (width, height) = match m_cell {
-                    Cell::DynamicCellFormula { r, .. }
-                    | Cell::DynamicCellFormulaBoolean { r, .. }
-                    | Cell::DynamicCellFormulaNumber { r, .. }
-                    | Cell::DynamicCellFormulaString { r, .. }
-                    | Cell::DynamicCellFormulaError { r, .. } => (r.0, r.1),
-                    _ => return Err("Invalid structure".to_string()),
-                };
-                Ok(CellArrayStructure::DynamicChild(
-                    m_row, m_column, width, height,
-                ))
-            }
-            Cell::DynamicCellFormula { r, .. }
-            | Cell::DynamicCellFormulaBoolean { r, .. }
-            | Cell::DynamicCellFormulaNumber { r, .. }
-            | Cell::DynamicCellFormulaString { r, .. }
-            | Cell::DynamicCellFormulaError { r, .. } => {
-                Ok(CellArrayStructure::DynamicMother(r.0, r.1))
-            }
-        }
-    }
-
    /// Returns a copy of the selected area
    pub fn copy_to_clipboard(&self) -> Result<Clipboard, String> {
        let selected_area = self.get_selected_view();
@@ -2116,24 +2043,6 @@ impl UserModel {
                    old_value,
                } => {
                    needs_evaluation = true;
-                    let cell = self
-                        .model
-                        .workbook
-                        .worksheet(*sheet)?
-                        .cell(*row, *column)
-                        .cloned()
-                        .unwrap_or_default();
-                    if let Some((width, height)) = cell.get_dynamic_range() {
-                        for r in *row..*row + height {
-                            for c in *column..*column + width {
-                                // skip the "mother" cell
-                                if r == *row && c == *column {
-                                    continue;
-                                }
-                                self.model.cell_clear_contents(*sheet, r, c)?;
-                            }
-                        }
-                    }
                    match *old_value.clone() {
                        Some(value) => {
                            self.model
--- a/base/src/user_model/history.rs
+++ b/base/src/user_model/history.rs
@@ -5,21 +5,18 @@ use bitcode::{Decode, Encode};
 use crate::types::{Cell, Col, Row, SheetState, Style, Worksheet};

 #[derive(Clone, Encode, Decode)]
-#[cfg_attr(debug_assertions, derive(Debug))]
 pub(crate) struct RowData {
    pub(crate) row: Option<Row>,
    pub(crate) data: HashMap<i32, Cell>,
 }

 #[derive(Clone, Encode, Decode)]
-#[cfg_attr(debug_assertions, derive(Debug))]
 pub(crate) struct ColumnData {
    pub(crate) column: Option<Col>,
    pub(crate) data: HashMap<i32, Cell>,
 }

 #[derive(Clone, Encode, Decode)]
-#[cfg_attr(debug_assertions, derive(Debug))]
 pub(crate) enum Diff {
    // Cell diffs
    SetCellValue {
--- a/bindings/nodejs/README.md
+++ b/bindings/nodejs/README.md
@@ -4,15 +4,20 @@
 Example usage:

 ```javascript
-import { Model } from '@ironcalc/wasm';
+import { Model } from '@ironcalc/nodejs';
 
 const model = new Model("Workbook1", "en", "UTC");

 model.setUserInput(0, 1, 1, "=1+1");
-const result1 = model.getFormattedCellValue(0, 1, 1);

-console.log('Cell value', result1);
+const result1 = model.getFormattedCellValue(0, 1, 1);
+console.log('Cell value', result1); // "#ERROR"
+
+model.evaluate();
+
+const resultAfterEvaluate = model.getFormattedCellValue(0, 1, 1);
+console.log('Cell value', resultAfterEvaluate); // 2

 let result2 = model.getCellStyle(0, 1, 1);
 console.log('Cell style', result2);
-```
+```
--- a/bindings/wasm/src/lib.rs
+++ b/bindings/wasm/src/lib.rs
@@ -766,21 +766,4 @@ impl Model {
            .get_first_non_empty_in_row_after_column(sheet, row, column)
            .map_err(to_js_error)
    }
-
-    #[wasm_bindgen(
-        js_name = "getCellArrayStructure",
-        unchecked_return_type = "CellArrayStructure"
-    )]
-    pub fn get_cell_array_structure(
-        &self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-    ) -> Result<JsValue, JsError> {
-        let cell_structure = self
-            .model
-            .get_cell_array_structure(sheet, row, column)
-            .map_err(|e| to_js_error(e.to_string()))?;
-        serde_wasm_bindgen::to_value(&cell_structure).map_err(JsError::from)
-    }
 }
--- a/bindings/wasm/types.ts
+++ b/bindings/wasm/types.ts
@@ -109,11 +109,6 @@ export interface MarkedToken {
  end: number;
 }

-export type CellArrayStructure =
-  | "SingleCell"
-  | { DynamicChild: [number, number, number, number] }
-  | { DynamicMother: [number, number] };
-
 export interface WorksheetProperties {
  name: string;
  color: string;
@@ -221,7 +216,7 @@ export interface SelectedView {
 // };

 // type ClipboardData = Record<string, Record <string, ClipboardCell>>;
-type ClipboardData = Map<number, Map<number, ClipboardCell>>;
+type ClipboardData = Map<number, Map <number, ClipboardCell>>;

 export interface ClipboardCell {
  text: string;
@@ -238,4 +233,4 @@ export interface DefinedName {
  name: string;
  scope?: number;
  formula: string;
-}
+}
--- a/docs/src/features/value-types.md
+++ b/docs/src/features/value-types.md
@@ -66,4 +66,8 @@ Using IronCalc, a complex number is a string of the form "1+j3".

 "#N/A" => #N/A

-## Arrays
+## Arrays
+
+## References
+
+A reference is a pointer to a single cell or a range of cells. The reference can either be entered manually, for example "A4", or as the result of a calculation, such as the OFFSET Function or the INDIRECT Function. A reference can also be built, for example with the Colon (\:) Operator. 
--- a/docs/src/functions/images/hyperbolicarccosine-curve.png
+++ b/docs/src/functions/images/hyperbolicarccosine-curve.png
--- a/docs/src/functions/images/hyperbolicarcsine-curve.png
+++ b/docs/src/functions/images/hyperbolicarcsine-curve.png
--- a/docs/src/functions/images/hyperbolicarctangent-curve.png
+++ b/docs/src/functions/images/hyperbolicarctangent-curve.png
--- a/docs/src/functions/lookup-and-reference.md
+++ b/docs/src/functions/lookup-and-reference.md
@@ -16,7 +16,7 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | CHOOSE       | <Badge type="tip" text="Available" />          | –             |
 | CHOOSECOLS   | <Badge type="info" text="Not implemented yet" /> | –             |
 | CHOOSEROWS   | <Badge type="info" text="Not implemented yet" /> | –             |
-| COLUMN       | <Badge type="tip" text="Available" />          | –             |
+| COLUMN       | <Badge type="tip" text="Available" />          | [COLUMN](lookup_and_reference/column)             |
 | COLUMNS      | <Badge type="tip" text="Available" />          | –             |
 | DROP         | <Badge type="info" text="Not implemented yet" /> | –             |
 | EXPAND       | <Badge type="info" text="Not implemented yet" /> | –             |
--- a/docs/src/functions/lookup_and_reference/column.md
+++ b/docs/src/functions/lookup_and_reference/column.md
@@ -4,8 +4,28 @@ outline: deep
 lang: en-US
 ---

-# COLUMN
-
-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+# COLUMN function
+## Overview
+The COLUMN Function in IronCalc is a lookup & reference formula that is used to query and return the column number of a referenced Column or Cell.
+## Usage
+### Syntax
+**COLUMN(<span title="Reference" style="color:#1E88E5">reference</span>) => <span title="Number" style="color:#1E88E5">column</span>**
+### Argument descriptions
+* *reference* ([cell](/features/value-types#references), [optional](/features/optional-arguments.md)). The number of the cell you wish to reference the column number of.
+### Additional guidance
+* When referencing a range of cells, only the column number of the left most cell will be returned.
+* You are also able to reference complete columns instead of individual cells.
+### Returned value
+COLUMN returns the [number](/features/value-types#numbers) of the specific cell or column which is being referenced.
+### Error conditions
+* IronCalc currently does not support the referencing of cells with names.
+## Details
+The COLUMN Function can only be used to display the correlating number of a single column within a Sheet. If you wish to show the number of columns used within a specific range, you can use the COLUMNS Function.
+## Examples
+### No Cell Reference
+When no cell reference is made, the formula uses **=COLUMN()**. This will then output the column number of the cell where the formula is placed.<br><br>For example, if the formula is placed in cell A1, then "1" will be displayed.
+### With Cell Reference
+When a cell reference is made, the formula uses **=COLUMN([Referenced Cell])**. This will then output the column number of the referenced cell, regardless of where the formula is placed in the sheet.<br><br>For example, if the cell B1 is the referenced cell, "2" will be the output of the formula no matter where it is placed in the sheet.<br><br>**Note:** references do not always have to be specific cells, you can also reference complete columns. For example, **=COLUMN(B:B)** would also result in an output of "2".
+### Range References
+The COLUMN function can also be used to reference a range of Cells or Columns. In this case only the most left-hand column will be the resulting output.<br><br>For example, **=COLUMN(A1:J1)** will result in the ouput of "1".
+## Links
--- a/docs/src/functions/math-and-trigonometry.md
+++ b/docs/src/functions/math-and-trigonometry.md
@@ -13,16 +13,16 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | --------------- | ---------------------------------------------- | ------------- |
 | ABS             | <Badge type="tip" text="Available" />          | –             |
 | ACOS            | <Badge type="tip" text="Available" />          | [ACOS](math_and_trigonometry/acos) |
-| ACOSH           | <Badge type="tip" text="Available" />          | –             |
+| ACOSH           | <Badge type="tip" text="Available" />          | [ACOSH](math_and_trigonometry/acosh) |
 | ACOT            | <Badge type="info" text="Not implemented yet" /> | –             |
 | ACOTH           | <Badge type="info" text="Not implemented yet" /> | –             |
 | AGGREGATE       | <Badge type="info" text="Not implemented yet" /> | –             |
 | ARABIC          | <Badge type="info" text="Not implemented yet" /> | –             |
 | ASIN            | <Badge type="tip" text="Available" />          | [ASIN](math_and_trigonometry/asin) |
-| ASINH           | <Badge type="tip" text="Available" />          | –             |
+| ASINH           | <Badge type="tip" text="Available" />          | [ASINH](math_and_trigonometry/asinh) |
 | ATAN            | <Badge type="tip" text="Available" />          | [ATAN](math_and_trigonometry/atan) |
-| ATAN2           | <Badge type="tip" text="Available" />          | –             |
-| ATANH           | <Badge type="tip" text="Available" />          | –             |
+| ATAN2           | <Badge type="tip" text="Available" />          | [ATAN2](math_and_trigonometry/atan2) |
+| ATANH           | <Badge type="tip" text="Available" />          | [ATANH](math_and_trigonometry/atanh) |
 | BASE            | <Badge type="info" text="Not implemented yet" /> | –             |
 | CEILING         | <Badge type="info" text="Not implemented yet" /> | –             |
 | CEILING.MATH    | <Badge type="info" text="Not implemented yet" /> | –             |
@@ -49,9 +49,9 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | ISO.CEILING     | <Badge type="info" text="Not implemented yet" /> | –             |
 | LCM             | <Badge type="info" text="Not implemented yet" /> | –             |
 | LET             | <Badge type="info" text="Not implemented yet" /> | –             |
-| LN              | <Badge type="info" text="Not implemented yet" /> | –             |
-| LOG             | <Badge type="info" text="Not implemented yet" /> | –             |
-| LOG10           | <Badge type="info" text="Not implemented yet" /> | –             |
+| LN              | <Badge type="info" text="Available" />           | –             |
+| LOG             | <Badge type="info" text="Available" />           | –             |
+| LOG10           | <Badge type="info" text="Available" />           | –             |
 | MDETERM         | <Badge type="info" text="Not implemented yet" /> | –             |
 | MINVERSE        | <Badge type="info" text="Not implemented yet" /> | –             |
 | MMULT           | <Badge type="info" text="Not implemented yet" /> | –             |
@@ -80,11 +80,11 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | SIN             | <Badge type="tip" text="Available" />          | [SIN](math_and_trigonometry/sin) |
 | SINH            | <Badge type="tip" text="Available" />          | [SINH](math_and_trigonometry/sinh) |
 | SQRT            | <Badge type="tip" text="Available" />          | –             |
-| SQRTPI          | <Badge type="info" text="Not implemented yet" /> | –             |
+| SQRTPI          | <Badge type="info" text="Available" />         | –             |
 | SUBTOTAL        | <Badge type="info" text="Not implemented yet" /> | –             |
 | SUM             | <Badge type="tip" text="Available" />          | –             |
 | SUMIF           | <Badge type="tip" text="Available" />          | –             |
-| SUMIFS          | <Badge type="info" text="Not implemented yet" /> | –             |
+| SUMIFS          | <Badge type="info" text="Available" />         | –             |
 | SUMPRODUCT      | <Badge type="info" text="Not implemented yet" /> | –             |
 | SUMSQ           | <Badge type="info" text="Not implemented yet" /> | –             |
 | SUMX2MY2        | <Badge type="info" text="Not implemented yet" /> | –             |
--- a/docs/src/functions/math_and_trigonometry/acosh.md
+++ b/docs/src/functions/math_and_trigonometry/acosh.md
@@ -3,9 +3,40 @@ layout: doc
 outline: deep
 lang: en-US
 ---
+# ACOSH function
+## Overview
+ACOSH is a function of the Math and Trigonometry category that calculates the inverse hyperbolic cosine (hyperbolic arccosine) of a number, returning a non-negative value in the range [0, +∞).
+## Usage
+### Syntax
+**ACOSH(<span title="Number" style="color:#1E88E5">number</span>) => <span title="Number" style="color:#1E88E5">acosh</span>**
+### Argument descriptions
+* *number* ([number](/features/value-types#numbers), required). The value whose hyperbolic arccosine is to be calculated. The value must be greater than or equal to 1.

-# ACOSH
+### Additional guidance
+The hyperbolic arccosine function is defined as:

-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+$$
+\operatorname{acosh}(x) = \ln(x + \sqrt{x^2 - 1})
+$$
+
+### Returned value
+ACOSH returns a [number](/features/value-types#numbers) in the range [0, +∞) that is the hyperbolic arccosine of the specified value, expressed in radians.
+### Error conditions
+* In common with many other IronCalc functions, ACOSH propagates errors that are found in its argument.
+* If no argument, or more than one argument, is supplied, then ACOSH returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of the *number* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ACOSH returns the [`#VALUE!`](/features/error-types.md#value) error.
+* If the value of the *number* argument is less than 1, then ACOSH returns the [`#NUM!`](/features/error-types.md#num) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ACOSH function utilizes the *acosh()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+* The figure below illustrates the output of the ACOSH function for values $x \geq 1$ in the range [0, +∞).
+<center><img src="/functions/images/hyperbolicarccosine-curve.png" width="350" alt="Graph showing acosh(x) for x ≥ 1."></center>
+
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=acosh).
+
+## Links
+* For more information about inverse hyperbolic functions, visit Wikipedia's [Inverse hyperbolic functions](https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions) page.
+* See also IronCalc's [COSH](/functions/math_and_trigonometry/cosh), [ASINH](/functions/math_and_trigonometry/asinh) and [ATANH](/functions/math_and_trigonometry/atanh) functions.
+* Visit Microsoft Excel's [ACOSH function](https://support.microsoft.com/en-us/office/acosh-function-e3992cc1-103f-4e72-9f04-624b9ef5ebfe) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093391) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ACOSH) provide versions of the ACOSH function.
--- a/docs/src/functions/math_and_trigonometry/asinh.md
+++ b/docs/src/functions/math_and_trigonometry/asinh.md
@@ -4,8 +4,36 @@ outline: deep
 lang: en-US
 ---

-# ASINH
+# ASINH function
+## Overview
+ASINH is a function of the Math and Trigonometry category that calculates the inverse hyperbolic sine (hyperbolic arcsine) of a number, returning the hyperbolic angle expressed in radians.
+## Usage
+### Syntax
+**ASINH(<span title="Number" style="color:#1E88E5">number</span>) => <span title="Number" style="color:#1E88E5">asinh</span>**
+### Argument descriptions
+* *number* ([number](/features/value-types#numbers), required). The value whose inverse hyperbolic sine is to be calculated. 
+### Additional guidance
+The hyperbolic arcsine function is defined as:
+$$
+\operatorname{asinh}(x) = \ln\!\left(x + \sqrt{x^2 + 1}\,\right)
+$$
+### Returned value
+ASINH returns a real [number](/features/value-types#numbers) in the range (-∞, +∞) that is the hyperbolic arcsine of the specified value, expressed in radians.
+### Error conditions
+* In common with many other IronCalc functions, ASINH propagates errors that are found in its argument.
+* If no argument, or more than one argument, is supplied, then ASINH returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of the *number* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ASINH returns the [`#VALUE!`](/features/error-types.md#value) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ASINH function utilizes the *asinh()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+* The figure below illustrates the output of the ASINH function.
+<center><img src="/functions/images/hyperbolicarcsine-curve.png" width="350" alt="Graph showing asinh(x)."></center>

-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=asinh).
+
+## Links
+* For more information about inverse hyperbolic functions, visit Wikipedia's [Inverse hyperbolic functions](https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions) page.
+* See also IronCalc's [SINH](/functions/math_and_trigonometry/sinh), [ACOSH](/functions/math_and_trigonometry/acosh) and [ATANH](/functions/math_and_trigonometry/atanh) functions.
+* Visit Microsoft Excel's [ASINH function](https://support.microsoft.com/de-de/office/asinh-function-62b4f5b6-d9cc-4c17-9d04-aa5371806c74) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093393) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ASINH) provide versions of the ASINH function.
--- a/docs/src/functions/math_and_trigonometry/atan2.md
+++ b/docs/src/functions/math_and_trigonometry/atan2.md
@@ -4,8 +4,34 @@ outline: deep
 lang: en-US
 ---

-# ATAN2
+# ATAN2 function
+## Overview
+ATAN2 is a function of the Math and Trigonometry category that calculates the inverse tangent (arctangent) for the specified *x* and *y* coordinates. The arctangent returns the angle defined by the x-axis and a line defined by the origin and a point with coordinates (x,y). The returned angle is expressed in radians, in the range (-$\pi$, +$\pi$].
+## Usage
+### Syntax
+**ATAN2(<span title="Number" style="color:#1E88E5">x,y</span>) => <span title="Number" style="color:#1E88E5">atan2</span>**
+### Argument descriptions
+* *x* ([number](/features/value-types#numbers), required). Value of the x coordinate.
+* *y* ([number](/features/value-types#numbers), required). Value of the y coordinate.
+### Additional guidance
+If the returned value is positive, it represents a counterclockwise angle from the x-axis, while a negative value represents a clockwise angle.  
+ATAN2(x,y) is equivalent to ATAN(y/x), with the difference that the x argument in ATAN2 can be 0.
+### Returned value
+ATAN2 returns a number in radians in the range (-$\pi$, +$\pi$] that is the inverse tangent for the specified x and y coordinates.
+### Error conditions
+* In common with many other IronCalc functions, ATAN2 propagates errors that are found in its argument.
+* If no argument, or arguments other than 2, are supplied, then ATAN2 returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of either the *x* or *y* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ATAN2 returns the [`#VALUE!`](/features/error-types.md#value) error.
+* If both *x* and *y* are equal to 0, ATAN2 returns a [`#DIV/0!`](/features/error-types.md#div-0) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ATAN2 function utilizes the *atan2()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=atan2).
+
+## Links
+* For more information about inverse trigonometric functions, visit Wikipedia's [Inverse trigonometric functions](https://en.wikipedia.org/wiki/Inverse_trigonometric_functions) page.
+* See also IronCalc's [ATAN](/functions/math_and_trigonometry/atan), [TAN](/functions/math_and_trigonometry/tan) and [ASIN](/functions/math_and_trigonometry/asin) functions.
+* Visit Microsoft Excel's [ATAN2 function](https://support.microsoft.com/en-us/office/atan2-function-51123ced-348c-416a-b2e2-833f7868569f) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093468) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ATAN2) provide versions of the ATAN2 function.

-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
--- a/docs/src/functions/math_and_trigonometry/atanh.md
+++ b/docs/src/functions/math_and_trigonometry/atanh.md
@@ -4,8 +4,37 @@ outline: deep
 lang: en-US
 ---

-# ATANH
+# ATANH function
+## Overview
+ATANH is a function of the Math and Trigonometry category that calculates the inverse hyperbolic tangent (hyperbolic arctangent) of a number in the range (-1, +1), returning the hyperbolic angle expressed in radians.
+## Usage
+### Syntax
+**ATANH(<span title="Number" style="color:#1E88E5">number</span>) => <span title="Number" style="color:#1E88E5">atanh</span>**
+### Argument descriptions
+* *number* ([number](/features/value-types#numbers), required). The value whose inverse hyperbolic tangent is to be calculated, in the range (-1,+1).
+### Additional guidance
+The hyperbolic arctangent function is defined as:
+$$
+\operatorname{atanh}(x) = \tfrac{1}{2}\,\ln\!\left(\dfrac{1+x}{1-x}\right),\quad |x| < 1
+$$
+### Returned value
+ATANH returns a real [number](/features/value-types#numbers) in the range (-∞, +∞) that is the hyperbolic arctangent of the specified value, expressed in radians.
+### Error conditions
+* In common with many other IronCalc functions, ATANH propagates errors that are found in its argument.
+* If no argument, or more than one argument, is supplied, then ATANH returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of the *number* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ATANH returns the [`#VALUE!`](/features/error-types.md#value) error.
+* If the value of the *number* argument lies outside the domain (-1, +1), then ATANH returns the [`#NUM!`](/features/error-types.md#num) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ATANH function utilizes the *atanh()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+* The figure below illustrates the output of the ATANH function.
+<center><img src="/functions/images/hyperbolicarctangent-curve.png" width="350" alt="Graph showing atanh(x)."></center>

-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=atanh).
+
+## Links
+* For more information about inverse hyperbolic functions, visit Wikipedia's [Inverse hyperbolic functions](https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions) page.
+* See also IronCalc's [ASINH](/functions/math_and_trigonometry/asinh), [ACOSH](/functions/math_and_trigonometry/acosh) and [TANH](/functions/math_and_trigonometry/tanh) functions.
+* Visit Microsoft Excel's [ATANH function](https://support.microsoft.com/de-de/office/atanh-function-453534d1-76a5-4f17-8c04-c3f2feee0dd5) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093397) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ATANH) provide versions of the ATANH function.
--- a/docs/src/functions/math_and_trigonometry/ln.md
+++ b/docs/src/functions/math_and_trigonometry/ln.md
@@ -7,6 +7,5 @@ lang: en-US
 # LN

 ::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
 :::
--- a/docs/src/functions/math_and_trigonometry/log.md
+++ b/docs/src/functions/math_and_trigonometry/log.md
@@ -7,6 +7,5 @@ lang: en-US
 # LOG

 ::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
 :::
--- a/docs/src/functions/math_and_trigonometry/log10.md
+++ b/docs/src/functions/math_and_trigonometry/log10.md
@@ -7,6 +7,5 @@ lang: en-US
 # LOG10

 ::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
 :::
--- a/webapp/IronCalc/src/components/FormulaBar/FormulaBar.tsx
+++ b/webapp/IronCalc/src/components/FormulaBar/FormulaBar.tsx
@@ -13,7 +13,6 @@ import type { WorkbookState } from "../workbookState";
 type FormulaBarProps = {
  cellAddress: string;
  formulaValue: string;
-  isPartOfArray: boolean;
  model: Model;
  workbookState: WorkbookState;
  onChange: () => void;
@@ -24,7 +23,6 @@ function FormulaBar(properties: FormulaBarProps) {
  const {
    cellAddress,
    formulaValue,
-    isPartOfArray,
    model,
    onChange,
    onTextUpdated,
@@ -64,9 +62,6 @@ function FormulaBar(properties: FormulaBarProps) {
            event.stopPropagation();
            event.preventDefault();
          }}
-          sx={{
-            color: isPartOfArray ? "grey" : "black",
-          }}
        >
          <Editor
            originalText={formulaValue}
@@ -104,10 +99,9 @@ const FormulaSymbolButton = styled(StyledButton)`

 const Divider = styled("div")`
  background-color: ${theme.palette.grey["300"]};
-  width: 1px;
-  height: 20px;
-  margin-left: 16px;
-  margin-right: 16px;
+  min-width: 1px;
+  height: 16px;
+  margin: 0px 16px;
 `;

 const FormulaContainer = styled("div")`
--- a/webapp/IronCalc/src/components/Toolbar/Toolbar.tsx
+++ b/webapp/IronCalc/src/components/Toolbar/Toolbar.tsx
--- a/webapp/IronCalc/src/components/Workbook/Workbook.tsx
+++ b/webapp/IronCalc/src/components/Workbook/Workbook.tsx
@@ -22,6 +22,7 @@ import {
  CLIPBOARD_ID_SESSION_STORAGE_KEY,
  getNewClipboardId,
 } from "../clipboard";
+import { TOOLBAR_HEIGHT } from "../constants";
 import {
  type NavigationKey,
  getCellAddress,
@@ -41,6 +42,8 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
  // This is needed because `model` or `workbookState` can change without React being aware of it
  const setRedrawId = useState(0)[1];

+  const [isDrawerOpen, setDrawerOpen] = useState(false);
+
  const worksheets = model.getWorksheetsProperties();
  const info = worksheets.map(
    ({ name, color, sheet_id, state }: WorksheetProperties) => {
@@ -362,19 +365,6 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
    return model.getCellContent(sheet, row, column);
  };

-  // returns true if it is either single cell or the root cell of an array
-  const isRootCellOfArray = () => {
-    const { sheet, row, column } = model.getSelectedView();
-    const r = model.getCellArrayStructure(sheet, row, column);
-    if (r === "SingleCell") {
-      return false;
-    }
-    if ("DynamicMother" in r) {
-      return false;
-    }
-    return true;
-  };
-
  const getCellStyle = useCallback(() => {
    const { sheet, row, column } = model.getSelectedView();
    return model.getCellStyle(sheet, row, column);
@@ -705,78 +695,119 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
          worksheets,
          definedNameList: model.getDefinedNameList(),
        }}
-      />
-      <FormulaBar
-        cellAddress={cellAddress()}
-        formulaValue={formulaValue()}
-        onChange={() => {
-          setRedrawId((id) => id + 1);
-          focusWorkbook();
+        openDrawer={() => {
+          setDrawerOpen(true);
        }}
-        onTextUpdated={() => {
-          setRedrawId((id) => id + 1);
-        }}
-        model={model}
-        workbookState={workbookState}
-        isPartOfArray={isRootCellOfArray()}
-      />
-      <Worksheet
-        model={model}
-        workbookState={workbookState}
-        refresh={(): void => {
-          setRedrawId((id) => id + 1);
-        }}
-        ref={worksheetRef}
      />
+      <WorksheetAreaLeft $drawerWidth={isDrawerOpen ? DRAWER_WIDTH : 0}>
+        <FormulaBar
+          cellAddress={cellAddress()}
+          formulaValue={formulaValue()}
+          onChange={() => {
+            setRedrawId((id) => id + 1);
+            focusWorkbook();
+          }}
+          onTextUpdated={() => {
+            setRedrawId((id) => id + 1);
+          }}
+          model={model}
+          workbookState={workbookState}
+        />
+        <Worksheet
+          model={model}
+          workbookState={workbookState}
+          refresh={(): void => {
+            setRedrawId((id) => id + 1);
+          }}
+          ref={worksheetRef}
+        />

-      <SheetTabBar
-        sheets={info}
-        selectedIndex={model.getSelectedSheet()}
-        workbookState={workbookState}
-        onSheetSelected={(sheet: number): void => {
-          if (info[sheet].state !== "visible") {
-            model.unhideSheet(sheet);
-          }
-          model.setSelectedSheet(sheet);
-          setRedrawId((value) => value + 1);
-        }}
-        onAddBlankSheet={(): void => {
-          model.newSheet();
-          setRedrawId((value) => value + 1);
-        }}
-        onSheetColorChanged={(hex: string): void => {
-          try {
-            model.setSheetColor(model.getSelectedSheet(), hex);
+        <SheetTabBar
+          sheets={info}
+          selectedIndex={model.getSelectedSheet()}
+          workbookState={workbookState}
+          onSheetSelected={(sheet: number): void => {
+            if (info[sheet].state !== "visible") {
+              model.unhideSheet(sheet);
+            }
+            model.setSelectedSheet(sheet);
            setRedrawId((value) => value + 1);
-          } catch (e) {
-            // TODO: Show a proper modal dialog
-            alert(`${e}`);
-          }
-        }}
-        onSheetRenamed={(name: string): void => {
-          try {
-            model.renameSheet(model.getSelectedSheet(), name);
+          }}
+          onAddBlankSheet={(): void => {
+            model.newSheet();
            setRedrawId((value) => value + 1);
-          } catch (e) {
-            // TODO: Show a proper modal dialog
-            alert(`${e}`);
-          }
-        }}
-        onSheetDeleted={(): void => {
-          const selectedSheet = model.getSelectedSheet();
-          model.deleteSheet(selectedSheet);
-          setRedrawId((value) => value + 1);
-        }}
-        onHideSheet={(): void => {
-          const selectedSheet = model.getSelectedSheet();
-          model.hideSheet(selectedSheet);
-          setRedrawId((value) => value + 1);
-        }}
-      />
+          }}
+          onSheetColorChanged={(hex: string): void => {
+            try {
+              model.setSheetColor(model.getSelectedSheet(), hex);
+              setRedrawId((value) => value + 1);
+            } catch (e) {
+              // TODO: Show a proper modal dialog
+              alert(`${e}`);
+            }
+          }}
+          onSheetRenamed={(name: string): void => {
+            try {
+              model.renameSheet(model.getSelectedSheet(), name);
+              setRedrawId((value) => value + 1);
+            } catch (e) {
+              // TODO: Show a proper modal dialog
+              alert(`${e}`);
+            }
+          }}
+          onSheetDeleted={(): void => {
+            const selectedSheet = model.getSelectedSheet();
+            model.deleteSheet(selectedSheet);
+            setRedrawId((value) => value + 1);
+          }}
+          onHideSheet={(): void => {
+            const selectedSheet = model.getSelectedSheet();
+            model.hideSheet(selectedSheet);
+            setRedrawId((value) => value + 1);
+          }}
+        />
+      </WorksheetAreaLeft>
+      <WorksheetAreaRight $drawerWidth={isDrawerOpen ? DRAWER_WIDTH : 0}>
+        <span
+          onClick={() => setDrawerOpen(false)}
+          onKeyDown={(e) => {
+            if (e.key === "Enter" || e.key === " ") {
+              setDrawerOpen(false);
+            }
+          }}
+          aria-label="Close drawer"
+        >
+          x
+        </span>
+      </WorksheetAreaRight>
    </Container>
  );
 };

+const DRAWER_WIDTH = 300;
+
+type WorksheetAreaLeftProps = { $drawerWidth: number };
+const WorksheetAreaLeft = styled("div")<WorksheetAreaLeftProps>(
+  ({ $drawerWidth }) => ({
+    position: "absolute",
+    top: `${TOOLBAR_HEIGHT + 1}px`,
+    width: `calc(100% - ${$drawerWidth}px)`,
+    height: `calc(100% - ${TOOLBAR_HEIGHT + 1}px)`,
+  }),
+);
+
+const WorksheetAreaRight = styled("div")<WorksheetAreaLeftProps>(
+  ({ $drawerWidth }) => ({
+    position: "absolute",
+    overflow: "hidden",
+    backgroundColor: "red",
+    right: 0,
+    top: `${TOOLBAR_HEIGHT + 1}px`,
+    bottom: 0,
+    width: `${$drawerWidth}px`,
+  }),
+);
+
 const Container = styled("div")`
  display: flex;
  flex-direction: column;
--- a/webapp/IronCalc/src/components/Worksheet/Worksheet.tsx
+++ b/webapp/IronCalc/src/components/Worksheet/Worksheet.tsx
@@ -14,16 +14,11 @@ import {
  LAST_COLUMN,
  LAST_ROW,
  ROW_HEIGH_SCALE,
-  cellArrayStructureColor,
  outlineBackgroundColor,
  outlineColor,
 } from "../WorksheetCanvas/constants";
 import WorksheetCanvas from "../WorksheetCanvas/worksheetCanvas";
-import {
-  FORMULA_BAR_HEIGHT,
-  NAVIGATION_HEIGHT,
-  TOOLBAR_HEIGHT,
-} from "../constants";
+import { FORMULA_BAR_HEIGHT, NAVIGATION_HEIGHT } from "../constants";
 import type { Cell } from "../types";
 import type { WorkbookState } from "../workbookState";
 import CellContextMenu from "./CellContextMenu";
@@ -60,7 +55,6 @@ const Worksheet = forwardRef(
    const spacerElement = useRef<HTMLDivElement>(null);
    const cellOutline = useRef<HTMLDivElement>(null);
    const areaOutline = useRef<HTMLDivElement>(null);
-    const cellArrayStructure = useRef<HTMLDivElement>(null);
    const extendToOutline = useRef<HTMLDivElement>(null);
    const columnResizeGuide = useRef<HTMLDivElement>(null);
    const rowResizeGuide = useRef<HTMLDivElement>(null);
@@ -87,7 +81,6 @@ const Worksheet = forwardRef(

      const outline = cellOutline.current;
      const area = areaOutline.current;
-      const arrayStructure = cellArrayStructure.current;
      const extendTo = extendToOutline.current;
      const editor = editorElement.current;

@@ -101,8 +94,7 @@ const Worksheet = forwardRef(
        !area ||
        !extendTo ||
        !scrollElement.current ||
-        !editor ||
-        !arrayStructure
+        !editor
      )
        return;
      // FIXME: This two need to be computed.
@@ -119,7 +111,6 @@ const Worksheet = forwardRef(
          rowGuide: rowGuideRef,
          columnHeaders: columnHeadersRef,
          cellOutline: outline,
-          cellArrayStructure: arrayStructure,
          areaOutline: area,
          extendToOutline: extendTo,
          editor: editor,
@@ -334,7 +325,6 @@ const Worksheet = forwardRef(
            />
          </EditorWrapper>
          <AreaOutline ref={areaOutline} />
-          <CellArrayStructure ref={cellArrayStructure} />
          <ExtendToOutline ref={extendToOutline} />
          <ColumnResizeGuide ref={columnResizeGuide} />
          <RowResizeGuide ref={rowResizeGuide} />
@@ -465,7 +455,7 @@ const SheetContainer = styled("div")`
 const Wrapper = styled("div")({
  position: "absolute",
  overflow: "scroll",
-  top: TOOLBAR_HEIGHT + FORMULA_BAR_HEIGHT + 1,
+  top: FORMULA_BAR_HEIGHT + 1,
  left: 0,
  right: 0,
  bottom: NAVIGATION_HEIGHT + 1,
@@ -520,12 +510,6 @@ const AreaOutline = styled("div")`
  background-color: ${outlineBackgroundColor};
 `;

-const CellArrayStructure = styled("div")`
-  position: absolute;
-  border: 1px solid ${cellArrayStructureColor};
-  border-radius: 3px;
-`;
-
 const CellOutline = styled("div")`
  position: absolute;
  border: 2px solid ${outlineColor};
--- a/webapp/IronCalc/src/components/WorksheetCanvas/constants.ts
+++ b/webapp/IronCalc/src/components/WorksheetCanvas/constants.ts
@@ -13,7 +13,6 @@ export const defaultTextColor = "#2E414D";

 export const outlineColor = "#F2994A";
 export const outlineBackgroundColor = "#F2994A1A";
-export const cellArrayStructureColor = "#64BDFDA1";

 export const LAST_COLUMN = 16_384;
 export const LAST_ROW = 1_048_576;
--- a/webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts
+++ b/webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts
@@ -31,7 +31,6 @@ export interface CanvasSettings {
    canvas: HTMLCanvasElement;
    cellOutline: HTMLDivElement;
    areaOutline: HTMLDivElement;
-    cellArrayStructure: HTMLDivElement;
    extendToOutline: HTMLDivElement;
    columnGuide: HTMLDivElement;
    rowGuide: HTMLDivElement;
@@ -91,8 +90,6 @@ export default class WorksheetCanvas {

  cellOutlineHandle: HTMLDivElement;

-  cellArrayStructure: HTMLDivElement;
-
  extendToOutline: HTMLDivElement;

  workbookState: WorkbookState;
@@ -127,7 +124,6 @@ export default class WorksheetCanvas {
    this.refresh = options.refresh;

    this.cellOutline = options.elements.cellOutline;
-    this.cellArrayStructure = options.elements.cellArrayStructure;
    this.areaOutline = options.elements.areaOutline;
    this.extendToOutline = options.elements.extendToOutline;
    this.rowGuide = options.elements.rowGuide;
@@ -1519,20 +1515,16 @@ export default class WorksheetCanvas {
  }

  private drawCellOutline(): void {
-    const { cellArrayStructure, cellOutline, areaOutline, cellOutlineHandle } =
-      this;
+    const { cellOutline, areaOutline, cellOutlineHandle } = this;
    if (this.workbookState.getEditingCell()) {
      cellOutline.style.visibility = "hidden";
      cellOutlineHandle.style.visibility = "hidden";
      areaOutline.style.visibility = "hidden";
-      cellArrayStructure.style.visibility = "hidden";
      return;
    }
    cellOutline.style.visibility = "visible";
    cellOutlineHandle.style.visibility = "visible";
    areaOutline.style.visibility = "visible";
-    // This one is hidden by default
-    cellArrayStructure.style.visibility = "hidden";

    const [selectedSheet, selectedRow, selectedColumn] =
      this.model.getSelectedCell();
@@ -1588,34 +1580,6 @@ export default class WorksheetCanvas {
      [handleX, handleY] = this.getCoordinatesByCell(rowStart, columnStart);
      handleX += this.getColumnWidth(selectedSheet, columnStart);
      handleY += this.getRowHeight(selectedSheet, rowStart);
-      // we draw the array structure if needed only in this case
-      const arrayStructure = this.model.getCellArrayStructure(
-        selectedSheet,
-        selectedRow,
-        selectedColumn,
-      );
-      let array = null;
-      if (arrayStructure === "SingleCell") {
-        // nothing to see here
-      } else if ("DynamicMother" in arrayStructure) {
-        cellArrayStructure.style.visibility = "visible";
-        const [arrayWidth, arrayHeight] = arrayStructure.DynamicMother;
-        array = [selectedRow, selectedColumn, arrayWidth, arrayHeight];
-      } else {
-        cellArrayStructure.style.visibility = "visible";
-        array = arrayStructure.DynamicChild;
-      }
-      if (array !== null) {
-        const [arrayX, arrayY] = this.getCoordinatesByCell(array[0], array[1]);
-        const [arrayX1, arrayY1] = this.getCoordinatesByCell(
-          array[0] + array[3],
-          array[1] + array[2],
-        );
-        cellArrayStructure.style.left = `${arrayX}px`;
-        cellArrayStructure.style.top = `${arrayY}px`;
-        cellArrayStructure.style.width = `${arrayX1 - arrayX}px`;
-        cellArrayStructure.style.height = `${arrayY1 - arrayY}px`;
-      }
    } else {
      areaOutline.style.visibility = "visible";
      cellOutlineHandle.style.visibility = "visible";
--- a/webapp/IronCalc/src/components/constants.tsx
+++ b/webapp/IronCalc/src/components/constants.tsx
@@ -1,3 +1,3 @@
-export const TOOLBAR_HEIGHT = 48;
+export const TOOLBAR_HEIGHT = 40;
 export const FORMULA_BAR_HEIGHT = 40;
 export const NAVIGATION_HEIGHT = 40;
--- a/webapp/IronCalc/src/icons/index.ts
+++ b/webapp/IronCalc/src/icons/index.ts
@@ -18,6 +18,7 @@ import InsertRowAboveIcon from "./insert-row-above.svg?react";
 import InsertRowBelow from "./insert-row-below.svg?react";

 import IronCalcIcon from "./ironcalc_icon.svg?react";
+import IronCalcIconWhite from "./ironcalc_icon_white.svg?react";
 import IronCalcLogo from "./orange+black.svg?react";

 import Fx from "./fx.svg?react";
@@ -41,6 +42,7 @@ export {
  InsertRowAboveIcon,
  InsertRowBelow,
  IronCalcIcon,
+  IronCalcIconWhite,
  IronCalcLogo,
  Fx,
 };
--- a/webapp/IronCalc/src/icons/ironcalc_icon_white.svg
+++ b/webapp/IronCalc/src/icons/ironcalc_icon_white.svg
@@ -0,0 +1,7 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path opacity="0.8" d="M9.95898 8.08594C9.60893 8.35318 9.27389 8.64313 8.95898 8.95801C7.09126 10.8257 6.042 13.3586 6.04199 16H6.04102V7.91406C6.39142 7.64662 6.72781 7.35715 7.04297 7.04199C8.90157 5.18307 9.9492 2.6648 9.95898 0.0371094V8.08594Z" fill="white"/>
+<path opacity="0.8" d="M6.04102 7.91406C4.31493 9.23162 2.19571 9.95898 0 9.95898V6.04102C1.60208 6.04102 3.13861 5.40429 4.27148 4.27148C5.40436 3.13861 6.04101 1.60213 6.04102 0L6.04102 7.91406Z" fill="white"/>
+<path opacity="0.8" d="M9.95947 8.08594C11.6856 6.76838 13.8048 6.04102 16.0005 6.04102V9.95898C14.3984 9.95898 12.8619 10.5957 11.729 11.7285C10.5961 12.8614 9.95948 14.3979 9.95947 16L9.95947 8.08594Z" fill="white"/>
+<path d="M9.95898 0C9.95898 2.64126 8.90957 5.17429 7.04199 7.04199C6.727 7.35698 6.39119 7.64674 6.04102 7.91406L6.04102 0H9.95898Z" fill="white"/>
+<path d="M6.04102 16C6.04102 13.3587 7.09042 10.8257 8.95801 8.95801C9.273 8.64302 9.60881 8.35326 9.95898 8.08594V16H6.04102Z" fill="white"/>
+</svg>
--- a/webapp/IronCalc/src/index.ts
+++ b/webapp/IronCalc/src/index.ts
@@ -1,5 +1,5 @@
 import init, { Model } from "@ironcalc/wasm";
 import IronCalc from "./IronCalc";
-import { IronCalcIcon, IronCalcLogo } from "./icons";
+import { IronCalcIcon, IronCalcIconWhite, IronCalcLogo } from "./icons";

-export { init, Model, IronCalc, IronCalcIcon, IronCalcLogo };
+export { init, Model, IronCalc, IronCalcIcon, IronCalcIconWhite, IronCalcLogo };
--- a/webapp/IronCalc/src/locale/en_us.json
+++ b/webapp/IronCalc/src/locale/en_us.json
@@ -27,13 +27,15 @@
    "vertical_align_top": "Align top",
    "selected_png": "Export Selected area as PNG",
    "wrap_text": "Wrap text",
+    "scroll_left": "Scroll left",
+    "scroll_right": "Scroll right",
    "format_menu": {
      "auto": "Auto",
      "number": "Number",
      "percentage": "Percentage",
      "currency_eur": "Euro (EUR)",
      "currency_usd": "Dollar (USD)",
-      "currency_gbp": "British Pound (GBD)",
+      "currency_gbp": "British Pound (GBP)",
      "date_short": "Short date",
      "date_long": "Long date",
      "custom": "Custom",
--- a/webapp/app.ironcalc.com/frontend/src/App.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/App.tsx
@@ -2,6 +2,7 @@ import "./App.css";
 import styled from "@emotion/styled";
 import { useEffect, useState } from "react";
 import { FileBar } from "./components/FileBar";
+import WelcomeDialog from "./components/WelcomeDialog/WelcomeDialog";
 import {
  get_documentation_model,
  get_model,
@@ -10,7 +11,8 @@ import {
 import {
  createNewModel,
  deleteSelectedModel,
-  loadModelFromStorageOrCreate,
+  isStorageEmpty,
+  loadSelectedModelFromStorage,
  saveModelToStorage,
  saveSelectedModelInStorage,
  selectModelFromStorage,
@@ -18,9 +20,13 @@ import {

 // From IronCalc
 import { IronCalc, IronCalcIcon, Model, init } from "@ironcalc/workbook";
+import { Modal } from "@mui/material";
+import TemplatesDialog from "./components/WelcomeDialog/TemplatesDialog";

 function App() {
  const [model, setModel] = useState<Model | null>(null);
+  const [showWelcomeDialog, setShowWelcomeDialog] = useState(false);
+  const [isTemplatesDialogOpen, setTemplatesDialogOpen] = useState(false);

  useEffect(() => {
    async function start() {
@@ -52,8 +58,14 @@ function App() {
        }
      } else {
        // try to load from local storage
-        const newModel = loadModelFromStorageOrCreate();
-        setModel(newModel);
+        const newModel = loadSelectedModelFromStorage();
+        if (!newModel) {
+          setShowWelcomeDialog(true);
+          const createdModel = new Model("template", "en", "UTC");
+          setModel(createdModel);
+        } else {
+          setModel(newModel);
+        }
      }
    }
    start();
@@ -93,7 +105,11 @@ function App() {
          setModel(newModel);
        }}
        newModel={() => {
-          setModel(createNewModel());
+          const createdModel = createNewModel();
+          setModel(createdModel);
+        }}
+        newModelFromTemplate={() => {
+          setTemplatesDialogOpen(true);
        }}
        setModel={(uuid: string) => {
          const newModel = selectModelFromStorage(uuid);
@@ -109,6 +125,51 @@ function App() {
        }}
      />
      <IronCalc model={model} />
+      {showWelcomeDialog && (
+        <WelcomeDialog
+          onClose={() => {
+            if (isStorageEmpty()) {
+              const createdModel = createNewModel();
+              setModel(createdModel);
+            }
+            setShowWelcomeDialog(false);
+          }}
+          onSelectTemplate={async (templateId) => {
+            switch (templateId) {
+              case "blank": {
+                const createdModel = createNewModel();
+                setModel(createdModel);
+                break;
+              }
+              default: {
+                const model_bytes = await get_documentation_model(templateId);
+                const importedModel = Model.from_bytes(model_bytes);
+                saveModelToStorage(importedModel);
+                setModel(importedModel);
+                break;
+              }
+            }
+            setShowWelcomeDialog(false);
+          }}
+        />
+      )}
+      <Modal
+        open={isTemplatesDialogOpen}
+        onClose={() => setTemplatesDialogOpen(false)}
+        aria-labelledby="templates-dialog-title"
+        aria-describedby="templates-dialog-description"
+      >
+        <TemplatesDialog
+          onClose={() => setTemplatesDialogOpen(false)}
+          onSelectTemplate={async (fileName) => {
+            const model_bytes = await get_documentation_model(fileName);
+            const importedModel = Model.from_bytes(model_bytes);
+            saveModelToStorage(importedModel);
+            setModel(importedModel);
+            setTemplatesDialogOpen(false);
+          }}
+        />
+      </Modal>
    </Wrapper>
  );
 }
--- a/webapp/app.ironcalc.com/frontend/src/components/FileBar.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/components/FileBar.tsx
@@ -27,6 +27,7 @@ function useWindowWidth() {
 export function FileBar(properties: {
  model: Model;
  newModel: () => void;
+  newModelFromTemplate: () => void;
  setModel: (key: string) => void;
  onModelUpload: (blob: ArrayBuffer, fileName: string) => Promise<void>;
  onDelete: () => void;
@@ -52,6 +53,7 @@ export function FileBar(properties: {
      <Divider />
      <FileMenu
        newModel={properties.newModel}
+        newModelFromTemplate={properties.newModelFromTemplate}
        setModel={properties.setModel}
        onModelUpload={properties.onModelUpload}
        onDownload={async () => {
--- a/webapp/app.ironcalc.com/frontend/src/components/FileMenu.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/components/FileMenu.tsx
@@ -1,13 +1,15 @@
 import styled from "@emotion/styled";
 import { Menu, MenuItem, Modal } from "@mui/material";
-import { Check, FileDown, FileUp, Plus, Trash2 } from "lucide-react";
+import { Check, FileDown, FileUp, Plus, Table2, Trash2 } from "lucide-react";
 import { useRef, useState } from "react";
 import DeleteWorkbookDialog from "./DeleteWorkbookDialog";
 import UploadFileDialog from "./UploadFileDialog";
+// import TemplatesDialog from "./WelcomeDialog/TemplatesDialog";
 import { getModelsMetadata, getSelectedUuid } from "./storage";

 export function FileMenu(props: {
  newModel: () => void;
+  newModelFromTemplate: () => void;
  setModel: (key: string) => void;
  onDownload: () => void;
  onModelUpload: (blob: ArrayBuffer, fileName: string) => Promise<void>;
@@ -20,7 +22,6 @@ export function FileMenu(props: {
  const uuids = Object.keys(models);
  const selectedUuid = getSelectedUuid();
  const [isDeleteDialogOpen, setDeleteDialogOpen] = useState(false);
-
  const elements = [];
  for (const uuid of uuids) {
    elements.push(
@@ -92,7 +93,18 @@ export function FileMenu(props: {
          <StyledIcon>
            <Plus />
          </StyledIcon>
-          <MenuItemText>New</MenuItemText>
+          <MenuItemText>New blank workbook</MenuItemText>
+        </MenuItemWrapper>
+        <MenuItemWrapper
+          onClick={() => {
+            props.newModelFromTemplate();
+            setMenuOpen(false);
+          }}
+        >
+          <StyledIcon>
+            <Table2 />
+          </StyledIcon>
+          <MenuItemText>New from template</MenuItemText>
        </MenuItemWrapper>
        <MenuItemWrapper
          onClick={() => {
@@ -105,6 +117,7 @@ export function FileMenu(props: {
          </StyledIcon>
          <MenuItemText>Import</MenuItemText>
        </MenuItemWrapper>
+        <MenuDivider />
        <MenuItemWrapper onClick={props.onDownload}>
          <StyledIcon>
            <FileDown />
--- a/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/TemplatesDialog.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/TemplatesDialog.tsx
@@ -0,0 +1,79 @@
+import { Dialog, styled } from "@mui/material";
+import { X } from "lucide-react";
+import { useState } from "react";
+import TemplatesList, {
+  Cross,
+  DialogContent,
+  DialogFooter,
+  DialogFooterButton,
+} from "./TemplatesList";
+
+function TemplatesDialog(properties: {
+  onClose: () => void;
+  onSelectTemplate: (templateId: string) => void;
+}) {
+  const [selectedTemplate, setSelectedTemplate] = useState<string>("");
+
+  const handleClose = () => {
+    properties.onClose();
+  };
+
+  const handleTemplateSelect = (templateId: string) => {
+    setSelectedTemplate(templateId);
+  };
+
+  return (
+    <DialogWrapper open={true} onClose={() => {}}>
+      <DialogTemplateHeader>
+        <span style={{ flexGrow: 2, marginLeft: 12 }}>Choose a template</span>
+        <Cross
+          style={{ marginRight: 12 }}
+          onClick={handleClose}
+          title="Close Dialog"
+          tabIndex={0}
+          onKeyDown={(event) => event.key === "Enter" && properties.onClose()}
+        >
+          <X />
+        </Cross>
+      </DialogTemplateHeader>
+      <DialogContent>
+        <TemplatesList
+          selectedTemplate={selectedTemplate}
+          handleTemplateSelect={handleTemplateSelect}
+        />
+      </DialogContent>
+      <DialogFooter>
+        <DialogFooterButton
+          onClick={() => properties.onSelectTemplate(selectedTemplate)}
+        >
+          Create workbook
+        </DialogFooterButton>
+      </DialogFooter>
+    </DialogWrapper>
+  );
+}
+
+export const DialogWrapper = styled(Dialog)`
+  font-family: Inter;
+  .MuiDialog-paper {
+    width: 440px;
+    border-radius: 12px;
+    margin: 16px;
+    border: 1px solid #e0e0e0;
+  }
+  .MuiBackdrop-root {
+    background-color: rgba(0, 0, 0, 0.4);
+  }
+`;
+
+const DialogTemplateHeader = styled("div")`
+  display: flex;
+  align-items: center;
+  border-bottom: 1px solid #e0e0e0;
+  height: 44px;
+  font-size: 14px;
+  font-weight: 500;
+  font-family: Inter;
+`;
+
+export default TemplatesDialog;
--- a/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/TemplatesList.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/TemplatesList.tsx
@@ -0,0 +1,103 @@
+import { Dialog, styled } from "@mui/material";
+import { House, TicketsPlane } from "lucide-react";
+import TemplatesListItem from "./TemplatesListItem";
+
+function TemplatesList(props: {
+  selectedTemplate: string;
+  handleTemplateSelect: (templateId: string) => void;
+}) {
+  const { selectedTemplate, handleTemplateSelect } = props;
+  return (
+    <TemplatesListWrapper>
+      <TemplatesListItem
+        title="Mortgage calculator"
+        description="Estimate payments, interest, and overall cost."
+        icon={<House />}
+        iconColor="#2F80ED"
+        active={selectedTemplate === "mortgage_calculator"}
+        onClick={() => handleTemplateSelect("mortgage_calculator")}
+      />
+      <TemplatesListItem
+        title="Travel expenses tracker"
+        description="Track trip costs and stay on budget."
+        icon={<TicketsPlane />}
+        iconColor="#EB5757"
+        active={selectedTemplate === "travel_expenses_tracker"}
+        onClick={() => handleTemplateSelect("travel_expenses_tracker")}
+      />
+    </TemplatesListWrapper>
+  );
+}
+
+export const DialogWrapper = styled(Dialog)`
+  font-family: Inter;
+  .MuiDialog-paper {
+    width: 440px;
+    border-radius: 12px;
+    margin: 16px;
+    border: 1px solid #e0e0e0;
+  }
+  .MuiBackdrop-root {
+    background-color: rgba(0, 0, 0, 0.4);
+  }
+`;
+
+export const Cross = styled("div")`
+  &:hover {
+    background-color: #f5f5f5;
+  }
+  display: flex;
+  border-radius: 4px;
+  min-height: 24px;
+  min-width: 24px;
+  cursor: pointer;
+  align-items: center;
+  justify-content: center;
+  svg {
+    width: 16px;
+    height: 16px;
+    stroke-width: 1.5;
+  }
+`;
+
+export const DialogContent = styled("div")`
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  padding: 16px;
+  max-height: 300px;
+  overflow: hidden;
+  overflow-y: auto;
+`;
+
+export const TemplatesListWrapper = styled("div")`
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+`;
+
+export const DialogFooter = styled("div")`
+  border-top: 1px solid #e0e0e0;
+  padding: 16px;
+`;
+
+export const DialogFooterButton = styled("button")`
+  background-color: #f2994a;
+  border: none;
+  color: #fff;
+  padding: 12px;
+  border-radius: 4px;
+  cursor: pointer;
+  width: 100%;
+  font-size: 12px;
+  font-family: Inter;
+  &:hover {
+    background-color: #d68742;
+  }
+  &:active {
+    background-color: #d68742;
+  }
+`;
+
+// export default TemplatesDialog;
+export default TemplatesList;
--- a/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/TemplatesListItem.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/TemplatesListItem.tsx
@@ -0,0 +1,107 @@
+import { styled } from "@mui/material";
+import type { ReactNode } from "react";
+
+interface TemplatesListItemProps {
+  title: string;
+  description: string;
+  icon: ReactNode;
+  iconColor: string;
+  active: boolean;
+  onClick: () => void;
+}
+
+function TemplatesListItem({
+  title,
+  description,
+  icon,
+  iconColor,
+  active,
+  onClick,
+}: TemplatesListItemProps) {
+  return (
+    <ListItemWrapper active={active} iconColor={iconColor} onClick={onClick}>
+      <StyledIcon iconColor={iconColor}>{icon}</StyledIcon>
+      <TemplatesListItemTitle>
+        <Title>{title}</Title>
+        <Subtitle>{description}</Subtitle>
+      </TemplatesListItemTitle>
+      <RadioButton active={active}>
+        <RadioButtonDot />
+      </RadioButton>
+    </ListItemWrapper>
+  );
+}
+
+const ListItemWrapper = styled("div")<{ active?: boolean; iconColor?: string }>`
+  display: flex;
+  flex-direction: row;
+  align-items: flex-start;
+  gap: 8px;
+  font-size: 12px;
+  color: #424242;
+  border: 1px solid ${(props) => (props.active ? props.iconColor || "#424242" : "rgba(224, 224, 224, 0.60)")};
+  background-color: #FFFFFF;
+  padding: 16px;
+  border-radius: 8px;
+  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
+  cursor: pointer;
+  outline: ${(props) => (props.active ? `4px solid ${props.iconColor || "#424242"}24` : "none")};
+  transition: border 0.1s ease-in-out;
+  user-select: none;
+  &:hover {
+    border: 1px solid ${(props) => props.iconColor};
+    transition: border 0.1s ease-in-out;
+  }
+`;
+
+const TemplatesListItemTitle = styled("div")`
+  display: flex;
+  flex-direction: column;
+  color: #424242;
+  width: 100%;
+  gap: 2px;
+`;
+
+const Title = styled("div")`
+  font-weight: 600;
+  color: #424242;
+  line-height: 16px;
+`;
+
+const Subtitle = styled("div")`
+  color: #757575;
+`;
+
+const StyledIcon = styled("div")<{ iconColor?: string }>`
+  display: flex;
+  align-items: center;
+  margin-top: -1px;
+  svg {
+    width: 18px;
+    height: 100%;
+    color: ${(props) => props.iconColor || "#424242"};
+  }
+`;
+
+const RadioButton = styled("div")<{ active?: boolean }>`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 16px;
+  min-width: 16px;
+  height: 16px;
+  border-radius: 16px;
+  margin-top: -4px;
+  margin-right: -4px;
+  background-color: ${(props) => (props.active ? "#F2994A" : "#FFFFFF")};
+  border: ${(props) => (props.active ? "none" : "1px solid #E0E0E0")};
+`;
+
+const RadioButtonDot = styled("div")`
+  width: 6px;
+  height: 6px;
+  border-radius: 6px;
+  background-color: #FFF;
+`;
+
+export default TemplatesListItem;
--- a/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/WelcomeDialog.tsx
+++ b/webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/WelcomeDialog.tsx
@@ -0,0 +1,136 @@
+import { IronCalcIconWhite as IronCalcIcon } from "@ironcalc/workbook";
+import { styled } from "@mui/material";
+import { Table, X } from "lucide-react";
+import { useState } from "react";
+import TemplatesListItem from "./TemplatesListItem";
+
+import TemplatesList, {
+  Cross,
+  DialogContent,
+  DialogFooter,
+  DialogFooterButton,
+  DialogWrapper,
+  TemplatesListWrapper,
+} from "./TemplatesList";
+
+function WelcomeDialog(properties: {
+  onClose: () => void;
+  onSelectTemplate: (templateId: string) => void;
+}) {
+  const [selectedTemplate, setSelectedTemplate] = useState<string>("blank");
+
+  const handleClose = () => {
+    properties.onClose();
+  };
+
+  const handleTemplateSelect = (templateId: string) => {
+    setSelectedTemplate(templateId);
+  };
+
+  return (
+    <DialogWrapper open={true} onClose={() => {}}>
+      <DialogWelcomeHeader>
+        <DialogHeaderTitleWrapper>
+          <DialogHeaderLogoWrapper>
+            <IronCalcIcon />
+          </DialogHeaderLogoWrapper>
+          <DialogHeaderTitle>Welcome to IronCalc</DialogHeaderTitle>
+          <DialogHeaderTitleSubtitle>
+            Start with a blank workbook or a ready-made template.
+          </DialogHeaderTitleSubtitle>
+        </DialogHeaderTitleWrapper>
+        <Cross
+          onClick={handleClose}
+          title="Close Dialog"
+          tabIndex={0}
+          onKeyDown={(event) => event.key === "Enter" && properties.onClose()}
+        >
+          <X />
+        </Cross>
+      </DialogWelcomeHeader>
+      <DialogContent>
+        <ListTitle>New</ListTitle>
+        <TemplatesListWrapper>
+          <TemplatesListItem
+            title="Blank workbook"
+            description="Create from scratch or upload your own file."
+            icon={<Table />}
+            iconColor="#F2994A"
+            active={selectedTemplate === "blank"}
+            onClick={() => handleTemplateSelect("blank")}
+          />
+        </TemplatesListWrapper>
+        <ListTitle>Templates</ListTitle>
+        <TemplatesList
+          selectedTemplate={selectedTemplate}
+          handleTemplateSelect={handleTemplateSelect}
+        />
+      </DialogContent>
+      <DialogFooter>
+        <DialogFooterButton
+          onClick={() => properties.onSelectTemplate(selectedTemplate)}
+        >
+          Create workbook
+        </DialogFooterButton>
+      </DialogFooter>
+    </DialogWrapper>
+  );
+}
+
+const DialogWelcomeHeader = styled("div")`
+  display: flex;
+  flex-direction: row;
+  align-items: flex-start;
+  border-bottom: 1px solid #e0e0e0;
+  padding: 16px;
+  font-family: Inter;
+`;
+
+const DialogHeaderTitleWrapper = styled("span")`
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  font-size: 14px;
+  font-weight: 500;
+  padding: 4px 0px;
+  gap: 4px;
+  width: 100%;
+`;
+
+const DialogHeaderTitle = styled("span")`
+  font-weight: 700;
+`;
+
+const DialogHeaderTitleSubtitle = styled("span")`
+  font-size: 12px;
+  color: #757575;
+`;
+
+const DialogHeaderLogoWrapper = styled("div")`
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  justify-content: center;
+  max-width: 20px;
+  max-height: 20px;
+  background-color: #f2994a;
+  padding: 10px;
+  margin-bottom: 12px;
+  border-radius: 6px;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+  transform: rotate(-8deg);
+  user-select: none;
+
+  svg {
+    width: 18px;
+    height: 18px;
+  }
+`;
+
+const ListTitle = styled("div")`
+  font-size: 12px;
+  font-weight: 600;
+  color: #424242;
+`;
+
+export default WelcomeDialog;
--- a/webapp/app.ironcalc.com/frontend/src/components/storage.ts
+++ b/webapp/app.ironcalc.com/frontend/src/components/storage.ts
@@ -60,7 +60,7 @@ export function createNewModel(): Model {
  return model;
 }

-export function loadModelFromStorageOrCreate(): Model {
+export function loadSelectedModelFromStorage(): Model | null {
  const uuid = localStorage.getItem("selected");
  if (uuid) {
    // We try to load the selected model
@@ -68,14 +68,22 @@ export function loadModelFromStorageOrCreate(): Model {
    if (modelBytesString) {
      return Model.from_bytes(base64ToBytes(modelBytesString));
    }
-    // If it doesn't exist we create one at that uuid
-    const newModel = new Model("Workbook1", "en", "UTC");
-    localStorage.setItem("selected", uuid);
-    localStorage.setItem(uuid, bytesToBase64(newModel.toBytes()));
-    return newModel;
  }
-  // If there was no selected model we create a new one
-  return createNewModel();
+  return null;
+}
+
+// check if storage is empty
+export function isStorageEmpty(): boolean {
+  const modelsJson = localStorage.getItem("models");
+  if (!modelsJson) {
+    return true;
+  }
+  try {
+    const models = JSON.parse(modelsJson);
+    return Object.keys(models).length === 0;
+  } catch (e) {
+    return true;
+  }
 }

 export function saveSelectedModelInStorage(model: Model) {
--- a/xlsx/src/bin/xlsx_2_icalc.rs
+++ b/xlsx/src/bin/xlsx_2_icalc.rs
@@ -7,7 +7,7 @@
 //! This is primary for QA internal testing and will be superseded by an official
 //! IronCalc CLI.
 //!
-//! Usage: test file.xlsx
+//! Usage: test file.xlsx [output.icalc]

 use std::path;

@@ -15,15 +15,20 @@ use ironcalc::{export::save_to_icalc, import::load_from_xlsx};

 fn main() {
    let args: Vec<_> = std::env::args().collect();
-    if args.len() != 2 {
-        panic!("Usage: {} <file.xlsx>", args[0]);
+    if args.len() != 2 && args.len() != 3 {
+        panic!("Usage: {} <file.xlsx> [output.icalc]", args[0]);
    }
    // first test the file
    let file_name = &args[1];

-    let file_path = path::Path::new(file_name);
-    let base_name = file_path.file_stem().unwrap().to_str().unwrap();
-    let output_file_name = &format!("{base_name}.ic");
+    let output_file_name = if args.len() == 3 {
+        &args[2]
+    } else {
+        let file_path = path::Path::new(file_name);
+        let base_name = file_path.file_stem().unwrap().to_str().unwrap();
+        &format!("{base_name}.ic")
+    };
+
    let model = load_from_xlsx(file_name, "en", "UTC").unwrap();
    save_to_icalc(&model, output_file_name).unwrap();
 }
--- a/xlsx/src/export/worksheets.rs
+++ b/xlsx/src/export/worksheets.rs
@@ -22,7 +22,7 @@ use itertools::Itertools;

 use ironcalc_base::{
    expressions::{
-        parser::{static_analysis::StaticResult, stringify::to_excel_string, Node},
+        parser::{stringify::to_excel_string, Node},
        types::CellReferenceRC,
        utils::number_to_column,
    },
@@ -56,7 +56,7 @@ fn get_formula_attribute(

 pub(crate) fn get_worksheet_xml(
    worksheet: &Worksheet,
-    parsed_formulas: &[(Node, StaticResult)],
+    parsed_formulas: &[Node],
    dimension: &str,
    is_sheet_selected: bool,
 ) -> String {
@@ -104,7 +104,7 @@ pub(crate) fn get_worksheet_xml(
                    let style = get_cell_style_attribute(*s);
                    row_data_str.push(format!("<c r=\"{cell_name}\"{style}/>"));
                }
-                Cell::SpillBooleanCell { v, s, .. } | Cell::BooleanCell { v, s } => {
+                Cell::BooleanCell { v, s } => {
                    // <c r="A8" t="b" s="1">
                    //     <v>1</v>
                    // </c>
@@ -114,7 +114,7 @@ pub(crate) fn get_worksheet_xml(
                        "<c r=\"{cell_name}\" t=\"b\"{style}><v>{b}</v></c>"
                    ));
                }
-                Cell::SpillNumberCell { v, s, .. } | Cell::NumberCell { v, s } => {
+                Cell::NumberCell { v, s } => {
                    // Normally the type number is left out. Example:
                    // <c r="C6" s="1">
                    //     <v>3</v>
@@ -122,7 +122,7 @@ pub(crate) fn get_worksheet_xml(
                    let style = get_cell_style_attribute(*s);
                    row_data_str.push(format!("<c r=\"{cell_name}\"{style}><v>{v}</v></c>"));
                }
-                Cell::SpillErrorCell { ei, s, .. } | Cell::ErrorCell { ei, s } => {
+                Cell::ErrorCell { ei, s } => {
                    let style = get_cell_style_attribute(*s);
                    row_data_str.push(format!(
                        "<c r=\"{cell_name}\" t=\"e\"{style}><v>{ei}</v></c>"
@@ -153,7 +153,7 @@ pub(crate) fn get_worksheet_xml(
                        worksheet.get_name(),
                        *row_index,
                        *column_index,
-                        &parsed_formulas[*f as usize].0,
+                        &parsed_formulas[*f as usize],
                    );

                    let b = i32::from(*v);
@@ -172,7 +172,7 @@ pub(crate) fn get_worksheet_xml(
                        worksheet.get_name(),
                        *row_index,
                        *column_index,
-                        &parsed_formulas[*f as usize].0,
+                        &parsed_formulas[*f as usize],
                    );
                    let style = get_cell_style_attribute(*s);

@@ -189,14 +189,14 @@ pub(crate) fn get_worksheet_xml(
                        worksheet.get_name(),
                        *row_index,
                        *column_index,
-                        &parsed_formulas[*f as usize].0,
+                        &parsed_formulas[*f as usize],
                    );
                    let style = get_cell_style_attribute(*s);
                    let escaped_v = escape_xml(v);

                    row_data_str.push(format!(
-                                    "<c r=\"{cell_name}\" t=\"str\"{style}><f>{formula}</f><v>{escaped_v}</v></c>"
-                                ));
+                        "<c r=\"{cell_name}\" t=\"str\"{style}><f>{formula}</f><v>{escaped_v}</v></c>"
+                    ));
                }
                Cell::CellFormulaError {
                    f,
@@ -213,135 +213,13 @@ pub(crate) fn get_worksheet_xml(
                        worksheet.get_name(),
                        *row_index,
                        *column_index,
-                        &parsed_formulas[*f as usize].0,
+                        &parsed_formulas[*f as usize],
                    );
                    let style = get_cell_style_attribute(*s);
                    row_data_str.push(format!(
                        "<c r=\"{cell_name}\" t=\"e\"{style}><f>{formula}</f><v>{ei}</v></c>"
                    ));
                }
-                Cell::SpillStringCell { v, s, .. } => {
-                    // inline string
-                    // <c r="A1" t="str">
-                    let style = get_cell_style_attribute(*s);
-                    let escaped_v = escape_xml(v);
-                    row_data_str.push(format!(
-                        "<c r=\"{cell_name}\" t=\"str\"{style}><v>{escaped_v}</v></c>"
-                    ));
-                }
-                Cell::DynamicCellFormula { .. } => {
-                    panic!("Model needs to be evaluated before saving!");
-                }
-                Cell::DynamicCellFormulaBoolean { f, v, s, r, a: _ } => {
-                    // <c r="A1" s="3" cm="1">
-                    //   <f t="array" ref="A1:A10">A1:A10</f>
-                    //   <v>1</v>
-                    // </c>
-                    let style = get_cell_style_attribute(*s);
-                    let range = format!(
-                        "{}{}:{}{}",
-                        column_name,
-                        row_index,
-                        number_to_column(r.0 + column_index).unwrap(),
-                        r.1 + row_index
-                    );
-
-                    let formula = get_formula_attribute(
-                        worksheet.get_name(),
-                        *row_index,
-                        *column_index,
-                        &parsed_formulas[*f as usize].0,
-                    );
-
-                    let b = i32::from(*v);
-                    row_data_str.push(format!(
-                        r#"<c r="{cell_name}" t="b" s="{style}" cm="1"><f t="array" ref="{range}">{formula}</f><v>{b}</v></c>"#
-                    ));
-                }
-                Cell::DynamicCellFormulaNumber { f, v, s, r, a: _ } => {
-                    // <c r="C4" s="3" cm="1">
-                    //   <f t="array" ref="C4:C10">C4:C10</f>
-                    //   <v>123</v>
-                    // </c>
-                    let style = get_cell_style_attribute(*s);
-                    let range = format!(
-                        "{}{}:{}{}",
-                        column_name,
-                        row_index,
-                        number_to_column(r.0 + column_index).unwrap(),
-                        r.1 + row_index
-                    );
-
-                    let formula = get_formula_attribute(
-                        worksheet.get_name(),
-                        *row_index,
-                        *column_index,
-                        &parsed_formulas[*f as usize].0,
-                    );
-
-                    row_data_str.push(format!(
-                        r#"<c r="{cell_name}" s="{style}" cm="1"><f t="array" ref="{range}">{formula}</f><v>{v}</v></c>"#
-                    ));
-                }
-                Cell::DynamicCellFormulaString { f, v, s, r, a: _ } => {
-                    // <c r="C6" t="str" s="5" cm="1">
-                    //   <f t="array" ref="C6:C10">C6:C10</f>
-                    //   <v>Hello world!</v>
-                    // </c>
-                    let style = get_cell_style_attribute(*s);
-                    let range = format!(
-                        "{}{}:{}{}",
-                        column_name,
-                        row_index,
-                        number_to_column(r.0 + column_index).unwrap(),
-                        r.1 + row_index
-                    );
-
-                    let formula = get_formula_attribute(
-                        worksheet.get_name(),
-                        *row_index,
-                        *column_index,
-                        &parsed_formulas[*f as usize].0,
-                    );
-                    let escaped_v = escape_xml(v);
-
-                    row_data_str.push(format!(
-                                    r#"<c r="{cell_name}" t="str" s="{style}" cm="1"><f t="array" ref="{range}">{formula}</f><v>{escaped_v}</v></c>"#
-                                ));
-                }
-                Cell::DynamicCellFormulaError {
-                    f,
-                    ei,
-                    s,
-                    o: _,
-                    m: _,
-                    r,
-                    a: _,
-                } => {
-                    // <c r="C6" t="e" s="4" cm="1">
-                    //   <f t="array" ref="C6:C10">C6:C10</f>
-                    //   <v>#DIV/0!</v>
-                    // </c>
-                    let style = get_cell_style_attribute(*s);
-                    let range = format!(
-                        "{}{}:{}{}",
-                        column_name,
-                        row_index,
-                        number_to_column(r.0 + column_index).unwrap(),
-                        r.1 + row_index
-                    );
-
-                    let formula = get_formula_attribute(
-                        worksheet.get_name(),
-                        *row_index,
-                        *column_index,
-                        &parsed_formulas[*f as usize].0,
-                    );
-
-                    row_data_str.push(format!(
-                        r#"<c r="{cell_name}" t="e" s="{style}" cm="1"><f t="array" ref="{range}">{formula}</f><v>{ei}</v></c>"#
-                    ));
-                }
            }
        }
        let row_style_str = match row_style_dict.get(row_index) {
--- a/xlsx/src/import/worksheets.rs
+++ b/xlsx/src/import/worksheets.rs
@@ -264,30 +264,29 @@ enum ParseReferenceError {
 // There is a similar named function in ironcalc_base. We probably should fix both at the same time.
 // NB: Maybe use regexes for this?
 fn parse_reference(s: &str) -> Result<CellReferenceRC, ParseReferenceError> {
-    let bytes = s.as_bytes();
    let mut sheet_name = "".to_string();
    let mut column = "".to_string();
    let mut row = "".to_string();
    let mut state = "sheet"; // "sheet", "col", "row"
-    for &byte in bytes {
+    for ch in s.chars() {
        match state {
            "sheet" => {
-                if byte == b'!' {
+                if ch == '!' {
                    state = "col"
                } else {
-                    sheet_name.push(byte as char);
+                    sheet_name.push(ch);
                }
            }
            "col" => {
-                if byte.is_ascii_alphabetic() {
-                    column.push(byte as char);
+                if ch.is_ascii_alphabetic() {
+                    column.push(ch);
                } else {
                    state = "row";
-                    row.push(byte as char);
+                    row.push(ch);
                }
            }
            _ => {
-                row.push(byte as char);
+                row.push(ch);
            }
        }
    }
@@ -304,15 +303,13 @@ fn from_a1_to_rc(
    context: String,
    tables: HashMap<String, Table>,
    defined_names: Vec<DefinedNameS>,
-    is_array: bool,
 ) -> Result<String, XlsxError> {
    let mut parser = Parser::new(worksheets.to_owned(), defined_names, tables);
    let cell_reference =
        parse_reference(&context).map_err(|error| XlsxError::Xml(error.to_string()))?;
    let mut t = parser.parse(&formula, &cell_reference);
-    if !is_array {
-        add_implicit_intersection(&mut t, true);
-    }
+    add_implicit_intersection(&mut t, true);
+
    Ok(to_rc_format(&t))
 }

@@ -840,7 +837,6 @@ pub(super) fn load_sheet<R: Read + std::io::Seek>(
            };

            let cell_metadata = cell.attribute("cm");
-            let is_dynamic_array = cell_metadata == Some("1");

            // type, the default type being "n" for number
            // If the cell does not have a value is an empty cell
@@ -907,7 +903,6 @@ pub(super) fn load_sheet<R: Read + std::io::Seek>(
                                    context,
                                    tables.clone(),
                                    defined_names.clone(),
-                                    is_dynamic_array,
                                )?;
                                match index_map.get(&si) {
                                    Some(index) => {
@@ -956,6 +951,7 @@ pub(super) fn load_sheet<R: Read + std::io::Seek>(
                        return Err(XlsxError::NotImplemented("data table formulas".to_string()));
                    }
                    "array" | "normal" => {
+                        let is_dynamic_array = cell_metadata == Some("1");
                        if formula_type == "array" && !is_dynamic_array {
                            // Dynamic formulas in Excel are formulas of type array with the cm=1, those we support.
                            // On the other hand the old CSE formulas or array formulas are not supported in IronCalc for the time being
@@ -970,7 +966,6 @@ pub(super) fn load_sheet<R: Read + std::io::Seek>(
                            context,
                            tables.clone(),
                            defined_names.clone(),
-                            is_dynamic_array,
                        )?;

                        match get_formula_index(&formula, &shared_formulas) {
@@ -1126,3 +1121,16 @@ pub(super) fn load_sheets<R: Read + std::io::Seek>(
    }
    Ok((sheets, selected_sheet))
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::import::worksheets::parse_reference;
+
+    #[test]
+    fn parse_reference_works() {
+        let cell_reference = parse_reference("📈 Overview!B2");
+        assert!(cell_reference.is_ok());
+        let cell_reference = cell_reference.unwrap();
+        assert_eq!(cell_reference.sheet, "📈 Overview");
+    }
+}
--- a/xlsx/tests/calc_tests/simple_spill.xlsx
+++ b/xlsx/tests/calc_tests/simple_spill.xlsx
--- a/xlsx/tests/templates/mortgage_calculator.xlsx
+++ b/xlsx/tests/templates/mortgage_calculator.xlsx
--- a/xlsx/tests/templates/travel_expenses_tracker.xlsx
+++ b/xlsx/tests/templates/travel_expenses_tracker.xlsx
--- a/xlsx/tests/test.rs
+++ b/xlsx/tests/test.rs
@@ -472,6 +472,45 @@ fn test_exporting_merged_cells() {
    fs::remove_file(temp_file_name).unwrap();
 }

+#[test]
+fn test_templates_xlsx() {
+    let mut entries = fs::read_dir("tests/templates/")
+        .unwrap()
+        .map(|res| res.map(|e| e.path()))
+        .collect::<Result<Vec<_>, io::Error>>()
+        .unwrap();
+    entries.sort();
+    let temp_folder = env::temp_dir();
+    let path = format!("{}", Uuid::new_v4());
+    let dir = temp_folder.join(path);
+    fs::create_dir(&dir).unwrap();
+    let mut is_error = false;
+    for file_path in entries {
+        let file_name_str = file_path.file_name().unwrap().to_str().unwrap();
+        let file_path_str = file_path.to_str().unwrap();
+        println!("Testing file: {file_path_str}");
+        if file_name_str.ends_with(".xlsx") && !file_name_str.starts_with('~') {
+            if let Err(message) = test_file(file_path_str) {
+                println!("Error with file: '{file_path_str}'");
+                println!("{message}");
+                is_error = true;
+            }
+            let t = test_load_and_saving(file_path_str, &dir);
+            if t.is_err() {
+                println!("Error while load and saving file: {file_path_str}");
+                is_error = true;
+            }
+        } else {
+            println!("skipping");
+        }
+    }
+    fs::remove_dir_all(&dir).unwrap();
+    assert!(
+        !is_error,
+        "Models were evaluated inconsistently with XLSX data."
+    );
+}
+
 #[test]
 fn test_documentation_xlsx() {
    let mut entries = fs::read_dir("tests/docs/")
Author	SHA1	Message	Date
Nicolás Hatcher	443ff6808d	UPDATE: WIP	2025-10-12 17:01:52 +02:00
Nicolás Hatcher	ed64716f0f	FIX: Refactor both dialogs to get common code	2025-10-12 14:23:12 +02:00
Nicolás Hatcher	dd29287c5a	FIX: Lifts TemplateDialog to App.tsx	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	7841abe2d2	update: use a different dialog for templates only	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	49c3d1e03a	chore: remove optional props	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	b709041f9d	chore: move new ic icon to icons folder	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	b177a33815	fix: remove obsolete css prefixes	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	b506ccf908	update: rename function	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	eb3e92ffd8	update: make dialogs content change depending on scenario	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	0b925a4d6a	update: add a second New from template action to FileMenu	2025-10-12 14:23:12 +02:00
Nicolás Hatcher	6a3e37f4c1	FIX: Integration of Welcome dialog	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	2496227344	fix: lint	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	72355a5201	update: add a compontent for the list items	2025-10-12 14:23:12 +02:00
Daniel Gonzalez Albo	81901ec717	update: add a welcome dialog to the app	2025-10-12 14:23:12 +02:00
Dmitry S	aa664a95a1	Fix example in README to reference Model correctly. Since https://github.com/ironcalc/IronCalc/pull/27, using `base::model::Model` complains about `model` being a private modulde, and `base::Model` should be used instead.	2025-10-08 08:56:03 +02:00
Daniel Gonzalez Albo	c1aa743763	fix: typo in format presets	2025-10-07 20:19:57 +02:00
Daniel Gonzalez Albo	6321030ac8	style: add offset to arrow's tooltips	2025-10-07 20:19:57 +02:00
Daniel Gonzalez Albo	c2c5751ee3	style: add nicer tooltips	2025-10-07 20:19:57 +02:00
Daniel Gonzalez Albo	6c27ae1355	update: show scroll arrows on narrow displays	2025-10-07 20:19:57 +02:00
Daniel Gonzalez Albo	7bcd978998	style: tiny adjustment in dividers	2025-10-07 20:19:57 +02:00
Daniel Gonzalez Albo	3f083d9882	adjust spacing and group button groups	2025-10-07 20:19:57 +02:00
Nicolás Hatcher	8844b80c51	FIX: cargo fmt issue	2025-09-28 17:33:17 +02:00
Nicolás Hatcher	0f8f345aae	UPDATE: have xlsx_2_icalc specify its output name This is nice for deployments	2025-09-28 17:33:17 +02:00
Nicolás Hatcher	3191e12b93	FIX: Make clippy happy	2025-09-28 17:33:17 +02:00
Nicolás Hatcher	61cecb7af5	FIX: Fixes case with unicode characters This is an ugly bug in ugly code. Pretty much technical deb in here	2025-09-28 12:46:16 +02:00
Nicolás Hatcher	fdeae2c771	UPDATE: Add templates	2025-09-28 12:46:16 +02:00
Matt Lehrer	3e9c69f122	add model.evaluate() call	2025-09-28 12:03:28 +02:00
Tom	c1c43143cc	Adds information about references and corrected syntax on Column This is a test commit	2025-09-25 19:25:32 +02:00
Tom	763b43a590	UPDATE: Added documentation for the Column Function	2025-09-25 19:25:32 +02:00
Daniel González-Albo	8dbfe07392	Merge pull request #443 from elsaminsut/mathfunctions docs: adds ATAN2, ASINH, ACOSH, ATANH documentation pages	2025-09-24 20:26:53 +02:00
Elsa Minsut	e39bfe912a	docs: improve consistency in ATAN2, ASINH, ACOSH, ATANH documentation	2025-09-24 19:36:30 +02:00
Elsa Minsut	9bbf94e033	update: Math and Trigonometry main page links	2025-09-24 19:19:16 +02:00
Elsa Minsut	0194912845	update: adds ATANH documentation page	2025-09-24 18:05:18 +02:00
Elsa Minsut	1d4d84bb57	update: adds ASINH documentation page	2025-09-24 17:46:56 +02:00
Elsa Minsut	e841c17aca	update: adds ACOSH documentation page	2025-09-24 17:19:37 +02:00
Elsa Minsut	f2c43f2070	update: adds ATAN2 documentation page	2025-09-24 17:06:20 +02:00
Nicolás Hatcher	32b1f8ef4e	FIX: Update documentation of some documented functions	2025-09-23 18:01:17 +02:00