Undo and Redo only works on annotation actions.
Undo an annotation by:
- Using the "CTRL + Z" keyboard shortcut.
- Using the arrow in the bottom of the screen
Redo an annotation by:
- Using the "CTRL + Y" keyboard shortcut.
- Using the arrow in the bottom of the screen
Undo/Redo does not work for the following situations:
- Restoring deleted annotations that have been cleared by 'Clear All Annotations'
- Restoring deleted or closed pages and documents