FIX: control+shitf selects area

webapp/IronCalc/src/components/Worksheet/usePointer.ts

@@ -236,10 +236,17 @@ const usePointer = (options: PointerSettings): PointerEvents => {
           );
           // we continue to select the new cell
         }
+        if (event.shiftKey) {
+          // We are extending the selection
+          options.onAreaSelecting(cell);
+          options.onAreaSelected();
+        } else {
+          // We are selecting a single cell
           options.onCellSelected(cell, event);
           isSelecting.current = true;
           worksheetWrapper.setPointerCapture(event.pointerId);
         }
+      }
     },
     [options],
   );