diff --git a/webapp/IronCalc/src/components/RightDrawer/NamedRanges/EditNamedRange.tsx b/webapp/IronCalc/src/components/RightDrawer/NamedRanges/EditNamedRange.tsx
index d4d0e02..a32357b 100644
--- a/webapp/IronCalc/src/components/RightDrawer/NamedRanges/EditNamedRange.tsx
+++ b/webapp/IronCalc/src/components/RightDrawer/NamedRanges/EditNamedRange.tsx
@@ -106,7 +106,6 @@ const EditNamedRange: React.FC<EditNamedRangeProps> = ({
               onClick={(event) => event.stopPropagation()}
             />
           </FieldWrapper>
-          <FieldWrapper></FieldWrapper>
         </StyledBox>
       </ContentArea>
       <Footer>
@@ -200,9 +199,9 @@ const StyledBox = styled(Box)`
   display: flex;
   flex-direction: column;
   align-items: center;
-  gap: 12px;
+  gap: 16px;
   width: auto;
-  padding: 12px;
+  padding: 16px 12px;
 
   @media (max-width: 600px) {
     padding: 12px;
@@ -228,7 +227,7 @@ const FieldWrapper = styled(Box)`
   display: flex;
   flex-direction: column;
   width: 100%;
-  gap: 4px;
+  gap: 6px;
 `;
 
 const StyledLabel = styled("label")`
@@ -240,9 +239,9 @@ const StyledLabel = styled("label")`
 `;
 
 const StyledHelperText = styled("p")`
-  font-size: 10px;
+  font-size: 12px;
   font-family: "Inter";
-  color: ${theme.palette.grey[400]};
+  color: ${theme.palette.grey[500]};
   margin: 0;
   line-height: 1.25;
 `;
diff --git a/webapp/IronCalc/src/components/RightDrawer/NamedRanges/NamedRanges.tsx b/webapp/IronCalc/src/components/RightDrawer/NamedRanges/NamedRanges.tsx
index ce3e057..b35a758 100644
--- a/webapp/IronCalc/src/components/RightDrawer/NamedRanges/NamedRanges.tsx
+++ b/webapp/IronCalc/src/components/RightDrawer/NamedRanges/NamedRanges.tsx
@@ -1,11 +1,16 @@
 import type { DefinedName, WorksheetProperties } from "@ironcalc/wasm";
 import { Button, Tooltip, styled } from "@mui/material";
 import { t } from "i18next";
-import { BookOpen, Plus } from "lucide-react";
+import { BookOpen, PencilLine, Plus, Trash2 } from "lucide-react";
 import { useState } from "react";
 import { theme } from "../../../theme";
 import EditNamedRange from "./EditNamedRange";
 
+// Normalize range strings for comparison (remove quotes, handle case, etc.)
+const normalizeRangeString = (range: string): string => {
+  return range.trim().replace(/['"]/g, "");
+};
+
 interface NamedRangesProps {
   title?: string;
   definedNameList?: DefinedName[];
@@ -22,6 +27,7 @@ interface NamedRangesProps {
     scope: number | undefined,
     formula: string,
   ) => void;
+  deleteDefinedName?: (name: string, scope: number | undefined) => void;
   selectedArea?: () => string;
 }
 
@@ -30,6 +36,7 @@ const NamedRanges: React.FC<NamedRangesProps> = ({
   worksheets = [],
   updateDefinedName,
   newDefinedName,
+  deleteDefinedName,
   selectedArea,
 }) => {
   const [editingDefinedName, setEditingDefinedName] =
@@ -123,6 +130,8 @@ const NamedRanges: React.FC<NamedRangesProps> = ({
   }
 
   // Show list view
+  const currentSelectedArea = selectedArea ? selectedArea() : null;
+
   return (
     <Container>
       <Content>
@@ -133,17 +142,50 @@ const NamedRanges: React.FC<NamedRangesProps> = ({
                 definedName.scope !== undefined
                   ? worksheets[definedName.scope]?.name || "[unknown]"
                   : "[global]";
+              // Check if this named range matches the currently selected area
+              const isSelected =
+                currentSelectedArea !== null &&
+                normalizeRangeString(definedName.formula) ===
+                  normalizeRangeString(currentSelectedArea);
               return (
                 <ListItem
                   key={`${definedName.name}-${definedName.scope}`}
-                  onClick={() => handleListItemClick(definedName)}
                   tabIndex={0}
+                  $isSelected={isSelected}
                 >
                   <ListItemText>
                     <NameText>{definedName.name}</NameText>
                     <ScopeText>{scopeName}</ScopeText>
                     <FormulaText>{definedName.formula}</FormulaText>
                   </ListItemText>
+
+                  <IconsWrapper>
+                    <Tooltip title={t("name_manager_dialog.edit")}>
+                      <IconButton
+                        onClick={(e) => {
+                          e.stopPropagation();
+                          handleListItemClick(definedName);
+                        }}
+                      >
+                        <PencilLine size={16} />
+                      </IconButton>
+                    </Tooltip>
+                    <Tooltip title={t("name_manager_dialog.delete")}>
+                      <IconButton
+                        onClick={(e) => {
+                          e.stopPropagation();
+                          if (deleteDefinedName) {
+                            deleteDefinedName(
+                              definedName.name,
+                              definedName.scope,
+                            );
+                          }
+                        }}
+                      >
+                        <Trash2 size={16} />
+                      </IconButton>
+                    </Tooltip>
+                  </IconsWrapper>
                 </ListItem>
               );
             })}
@@ -198,19 +240,26 @@ const ListContainer = styled("div")({
   flexDirection: "column",
 });
 
-const ListItem = styled("div")({
-  display: "flex",
-  alignItems: "center",
-  justifyContent: "space-between",
-  padding: "8px 12px",
-  minHeight: "40px",
-  cursor: "pointer",
-  boxSizing: "border-box",
-  borderBottom: `1px solid ${theme.palette.grey[200]}`,
-  "&:hover": {
-    backgroundColor: theme.palette.grey[50],
-  },
-});
+const ListItem = styled("div")<{ $isSelected?: boolean }>(
+  ({ $isSelected }) => ({
+    display: "flex",
+    alignItems: "flex-start",
+    justifyContent: "space-between",
+    padding: "8px 12px",
+    minHeight: "40px",
+    boxSizing: "border-box",
+    borderBottom: `1px solid ${theme.palette.grey[200]}`,
+    paddingLeft: $isSelected ? "20px" : "12px",
+    transition: "all 0.2s ease-in-out",
+    borderLeft: $isSelected
+      ? `3px solid ${theme.palette.primary.main}`
+      : "3px solid transparent",
+    "&:hover": {
+      backgroundColor: theme.palette.grey[50],
+      paddingLeft: "20px",
+    },
+  }),
+);
 
 const ListItemText = styled("div")({
   fontSize: "12px",
@@ -239,6 +288,26 @@ const NameText = styled("span")({
   fontWeight: 600,
 });
 
+const IconsWrapper = styled("div")({
+  display: "flex",
+  alignItems: "center",
+  gap: "2px",
+});
+
+const IconButton = styled("div")({
+  display: "flex",
+  alignItems: "center",
+  justifyContent: "center",
+  width: "24px",
+  height: "24px",
+  borderRadius: "4px",
+  backgroundColor: "transparent",
+  cursor: "pointer",
+  "&:hover": {
+    backgroundColor: theme.palette.grey[200],
+  },
+});
+
 export const Footer = styled("div")`
   padding: 8px;
   display: flex;
diff --git a/webapp/IronCalc/src/components/RightDrawer/RightDrawer.tsx b/webapp/IronCalc/src/components/RightDrawer/RightDrawer.tsx
index 3a61a33..ecc647e 100644
--- a/webapp/IronCalc/src/components/RightDrawer/RightDrawer.tsx
+++ b/webapp/IronCalc/src/components/RightDrawer/RightDrawer.tsx
@@ -5,17 +5,21 @@ import Tooltip from "@mui/material/Tooltip";
 import { styled } from "@mui/material/styles";
 import { t } from "i18next";
 import { X } from "lucide-react";
-import type { ReactNode } from "react";
+import type { MouseEvent as ReactMouseEvent, ReactNode } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { theme } from "../../theme";
 import { TOOLBAR_HEIGHT } from "../constants";
 import NamedRanges from "./NamedRanges/NamedRanges";
 
-const DEFAULT_DRAWER_WIDTH = 300;
+const DEFAULT_DRAWER_WIDTH = 360;
+const MIN_DRAWER_WIDTH = 300;
+const MAX_DRAWER_WIDTH = 500;
 
 interface RightDrawerProps {
   isOpen: boolean;
   onClose: () => void;
   width?: number;
+  onWidthChange?: (width: number) => void;
   children?: ReactNode;
   showCloseButton?: boolean;
   backgroundColor?: string;
@@ -34,6 +38,7 @@ interface RightDrawerProps {
     scope: number | undefined,
     formula: string,
   ) => void;
+  deleteDefinedName?: (name: string, scope: number | undefined) => void;
   selectedArea?: () => string;
 }
 
@@ -41,6 +46,7 @@ const RightDrawer = ({
   isOpen,
   onClose,
   width = DEFAULT_DRAWER_WIDTH,
+  onWidthChange,
   children,
   showCloseButton = true,
   title = "Named Ranges",
@@ -48,12 +54,67 @@ const RightDrawer = ({
   worksheets,
   updateDefinedName,
   newDefinedName,
+  deleteDefinedName,
   selectedArea,
 }: RightDrawerProps) => {
+  const [drawerWidth, setDrawerWidth] = useState(width);
+  const [isResizing, setIsResizing] = useState(false);
+  const resizeHandleRef = useRef<HTMLDivElement>(null);
+
+  // Update local width when prop changes
+  useEffect(() => {
+    setDrawerWidth(width);
+  }, [width]);
+
+  const handleMouseDown = useCallback((e: ReactMouseEvent) => {
+    e.preventDefault();
+    setIsResizing(true);
+  }, []);
+
+  useEffect(() => {
+    if (!isResizing) return;
+
+    // Prevent text selection during resize
+    document.body.style.userSelect = "none";
+    document.body.style.cursor = "col-resize";
+
+    const handleMouseMove = (e: MouseEvent) => {
+      const newWidth = window.innerWidth - e.clientX;
+      const clampedWidth = Math.max(
+        MIN_DRAWER_WIDTH,
+        Math.min(MAX_DRAWER_WIDTH, newWidth),
+      );
+      setDrawerWidth(clampedWidth);
+      onWidthChange?.(clampedWidth);
+    };
+
+    const handleMouseUp = () => {
+      setIsResizing(false);
+      document.body.style.userSelect = "";
+      document.body.style.cursor = "";
+    };
+
+    document.addEventListener("mousemove", handleMouseMove);
+    document.addEventListener("mouseup", handleMouseUp);
+
+    return () => {
+      document.removeEventListener("mousemove", handleMouseMove);
+      document.removeEventListener("mouseup", handleMouseUp);
+      document.body.style.userSelect = "";
+      document.body.style.cursor = "";
+    };
+  }, [isResizing, onWidthChange]);
+
   if (!isOpen) return null;
 
   return (
-    <DrawerContainer $drawerWidth={width}>
+    <DrawerContainer $drawerWidth={drawerWidth}>
+      <ResizeHandle
+        ref={resizeHandleRef}
+        onMouseDown={handleMouseDown}
+        $isResizing={isResizing}
+        aria-label="Resize drawer"
+      />
       {showCloseButton && (
         <Header>
           <HeaderTitle>
@@ -100,6 +161,7 @@ const RightDrawer = ({
           worksheets={worksheets}
           updateDefinedName={updateDefinedName}
           newDefinedName={newDefinedName}
+          deleteDefinedName={deleteDefinedName}
           selectedArea={selectedArea}
         />
       </DrawerContent>
@@ -178,5 +240,23 @@ const DrawerContent = styled("div")({
   height: "100%",
 });
 
+const ResizeHandle = styled("div")<{ $isResizing: boolean }>(
+  ({ $isResizing }) => ({
+    position: "absolute",
+    left: 0,
+    top: 0,
+    bottom: 0,
+    width: "4px",
+    cursor: "col-resize",
+    backgroundColor: $isResizing ? theme.palette.primary.main : "transparent",
+    zIndex: 10,
+    "&:hover": {
+      backgroundColor: theme.palette.primary.main,
+      opacity: 0.5,
+    },
+    transition: $isResizing ? "none" : "background-color 0.2s ease",
+  }),
+);
+
 export default RightDrawer;
-export { DEFAULT_DRAWER_WIDTH };
+export { DEFAULT_DRAWER_WIDTH, MIN_DRAWER_WIDTH, MAX_DRAWER_WIDTH };
diff --git a/webapp/IronCalc/src/components/Workbook/Workbook.tsx b/webapp/IronCalc/src/components/Workbook/Workbook.tsx
index 44d28cb..7a4ea5a 100644
--- a/webapp/IronCalc/src/components/Workbook/Workbook.tsx
+++ b/webapp/IronCalc/src/components/Workbook/Workbook.tsx
@@ -44,6 +44,7 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
   const setRedrawId = useState(0)[1];
 
   const [isDrawerOpen, setDrawerOpen] = useState(false);
+  const [drawerWidth, setDrawerWidth] = useState(DEFAULT_DRAWER_WIDTH);
 
   const worksheets = model.getWorksheetsProperties();
   const info = worksheets.map(
@@ -700,7 +701,7 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
           setDrawerOpen(true);
         }}
       />
-      <WorksheetAreaLeft $drawerWidth={isDrawerOpen ? DEFAULT_DRAWER_WIDTH : 0}>
+      <WorksheetAreaLeft $drawerWidth={isDrawerOpen ? drawerWidth : 0}>
         <FormulaBar
           cellAddress={cellAddress()}
           formulaValue={formulaValue()}
@@ -771,6 +772,8 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
       <RightDrawer
         isOpen={isDrawerOpen}
         onClose={() => setDrawerOpen(false)}
+        width={drawerWidth}
+        onWidthChange={setDrawerWidth}
         definedNameList={model.getDefinedNameList()}
         worksheets={worksheets}
         updateDefinedName={(
@@ -791,6 +794,10 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
           model.newDefinedName(name, scope, formula);
           setRedrawId((id) => id + 1);
         }}
+        deleteDefinedName={(name: string, scope: number | undefined) => {
+          model.deleteDefinedName(name, scope);
+          setRedrawId((id) => id + 1);
+        }}
         selectedArea={() => {
           const worksheetNames = worksheets.map((s) => s.name);
           const selectedView = model.getSelectedView();