Undo
In PDF Studio, it is possible to undo most actions.
Undo or redo by clicking on the 
Undo or 
Redo buttons on the toolbar, or by using the standard shortcut keys:
Undo: Ctrl + Z (⌘ + Z on macOS)
Redo: Ctrl + Y (Shift + ⌘ + Z on macOS)
Actions that can be undone / redone:
Annotations
(Textbox, callout, sticky note, typewriter, 8 shapes, sound, image, link, area highlight, measurements, stamp)
- Add
-
- New
- Paste
- My Comments
- Recent Comments
- Move
-
- Mouse
- Keyboard
- Resize
- Change properties
- Flatten
- Delete
- Mark with Checkmark
- Review
Bookmarks
- Add
- Rename
- Delete
- Reorder
Content editing – text, path objects, image
- Redact (before being applied)
- Delete
- Move
- Edit text properties (text data, font, outline color, size, etc..).
- Edit path object properties
- Resize path and image
Form
- Edit field contents
Markup (highlight, crossout, underline, squiggly, replace, insert)
- Add
- Move
- Change properties
- Flatten
- Delete
Pages
- Rotate
- Crop
- Header/Footer/Watermark
Actions that reset the undo / redo stacks:
Document
- Save
- Security
-
- Sign Field
- Sign
- Remove Signatures
Page
- Move
- Delete
Form
- Flatten form fields
- Reset form fields
Actions that are being ignored:
Document
- Attach file
- Add a blank page
- Insert pages
Import Annotations