Accidentally delete something you didn’t mean to? Accidentally un-did something you wanted to keep? These two buttons are very handy for those two problems.

• The undo button, the one on the left, reverses the action you just took, even if you’ve saved since.
• The redo button, the one on the right, is the exact opposite of the undo button; it reverses an undo.
• If you undo something, then do a new action, the first action cannot be redone.

***NOTE*** If you save and exit, you can no longer use the undo or redo buttons. 

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