If you make a mistake while entering a formula in the Formula Editor, press Ctrl+Z. This reverses the effect of the last (undoable) command.
You can also modify formulas with the following commands:
• Click the delete button (
) on the Formula Editor keypad to remove the selected expression.
• Use the cut, copy, and paste keyboard shortcut commands or right-click a highlighted part of the formula and select Cut, Copy, or Paste from the menu.
• Drag portions of the formula to rearrange them.