There are three places that you are able to undo/redo your changes
A) Toolbars in the Document Viewer. Tap the undo button to undo, or long press the undo button to bring up both undo and redo.
![Image: https://xodo.uservoice.com/assets/228595980/Screenshot_1618944732.jpg](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/35169140513/original/Rk-x5s_wGZGY0q1C49TYy81iC8ErTb7eBQ.png?1657144830)
![Image: https://xodo.uservoice.com/assets/228595977/Screenshot_1618944710.jpg](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/35169140512/original/L65sGNJd9qzFOnJCrY_BQASc1KoDZCsyyg.png?1657144830)
B) Thumbnails Viewer 1. Tap the Thumbnails icon from the bottom-left corner of the main screen. If you don't see the Bookmark icon, tap the center of your screen to bring it up.
![Image: https://xodo.uservoice.com/assets/228596022/Screenshot_1618944693.jpg](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/35169140511/original/Hxcq3m7mHfWtdIZizuMDqOhKSzhcDjl6rw.png?1657144829)
2. Tab on Edit button to show undo/redo buttons:
![Image: https://xodo.uservoice.com/assets/228596064/Screenshot_1618944738.jpg](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/35169140508/original/Wy7f8DwzAeoJN7Qr4ijUo_61lV8kVMK40Q.png?1657144827)
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/35169140514/original/UM1Iekg-06tfLpXP3mb_5FruhC9HhRuUXw.png?1657144830)
Note that the undo/redo stack is restricted to the edit pages actions (such as rotate, delete, duplicate, etc.) in the Thumbnails Viewer.