Undo or redo an action
To undo an action
On the Edit menu, click Undo.
Click Undo again to undo the action you performed before that, and so on.
To redo an action
On the Edit menu, click Redo.
Click Redo again to redo the action that you undid before that, and so on.
Note
The Undo and Redo commands are unavailable (dimmed) when there are no more actions to undo or redo.