Use Undo
to reverse the last action. Unlimited Undos are possible. Every time you click on Undo, the previous action is reversed. If you are not satisfied with the result of the Undo, click Redo.
To remove an area that was not the last created, select it, then click Delete
.
The Zoom commands cannot be reversed using Undo.
Shortcuts
Quick Access Toolbar:
Keys: Ctrl + Z