I was working on a new song, and I have been for the last couple of days. I just got the hardest part of the song finished, but realized that there was a minor mistake in the timing. So in an attempt to solve that problem, I used the copy measures button to move the group of measures a little farther ahead so that the timing could all be fixed in a single measure. Well, I entered a little bit of data wrong, and ended up with the opposite of what I wanted. For mistakes’ sakes, I think it would be nice to have an “Undo” button or at least a CTRL+Z key command, but even that doesn’t work. It would definitely save me a lot of time from having to do all the odd erasing, deleting, replacing, etc.