You can undo recent changes to the currently open file, and redo recently undone changes.
How do I undo a recent change?
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Click Undo.
How do I redo a recently undone change?
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Click Redo.
Tips and Tricks
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You can only redo changes that you have just undone. If you undo a change, then make other changes, you can no longer redo the change that was undone.