diff --git a/webapp/src/components/worksheet.tsx b/webapp/src/components/worksheet.tsx
index 0c782ad..e48f64b 100644
--- a/webapp/src/components/worksheet.tsx
+++ b/webapp/src/components/worksheet.tsx
@@ -293,6 +293,12 @@ function Worksheet(props: {
           break;
         }
       }
+      model.setSelectedRange(
+        Math.min(rowStart, extendedArea.rowStart),
+        Math.min(columnStart, extendedArea.columnStart),
+        Math.max(rowStart + height - 1, extendedArea.rowEnd),
+        Math.max(columnStart + width - 1, extendedArea.columnEnd),
+      );
       workbookState.clearExtendToArea();
       canvas.renderSheet();
     },