Can I undo an accidental operation in a note?

If you haven’t closed the note window, you can go back to the previous operation by pressing Command + Z on Mac or Ctrl + Z on Windows.

If you have already closed the note window, Command + Z won’t work, so you can use the change history to restore to a specific point in time.
Select “Change History” from the project menu.

The change history dialog will appear. Check the version you want to restore and click the “Restore to this version” button.