When making quick adjustments to your document, you may want to undo or redo the most recent action performed. You can undo and redo up to 10,000 actions in Foxit PDF Editor.
Undo your last action
- Click Undo
on the Quick Access toolbar of Foxit PDF Editor window. - Press Ctrl + Z.
Note: Some actions can’t be undone, such as clicking any command on the File tab. If you can’t undo an action, the Undo command will be grayed out 
.
Redo actions
- Click Redo
on the Quick Access toolbar of the Foxit PDF Editor window. - Press Shift + Ctrl + Z.