If you’re working on an email and want to undo something, you can click on the time stamp at the top of the campaign builder. If you don’t see the time stamp, make your browser window wider:
From here, you can choose to revert to a version from 1, 2, 3, 5, 10, 15, 30, or 60 minutes earlier.
If you’re working in a text module, you can Undo or Redo any text changes by using the arrow buttons:
Use the Undo button in the editor to undo your last action. If the button isn’t clickable, then it means your last action cannot be undone. You can also click Redo if you want to undo your undo: