I used control-Z repeatedly to undo some changes that I’d made to an original transcription. (I wanted to look at the original transcription for a moment before returning to my corrections.) Suddenly, the transcription from a different image was being displayed. Initially, I didn’t understand what had happened and was very confused. I had to restore the original transcription, losing my corrections. Afterward, I experimented and discovered that if one repeatedly uses control-Z to undo changes, eventually (after all the changes have been undone), Leo will go to the text of the transcription of the previous image one was looking at. If one doesn’t do anything else in between, one can fix this by using control-shift-Z.
I think it would be better if the text boxes could be linked to a single image so that this can’t happen.