I was just wondering if there's an undo function in the app. I had made many adjustments to a video to get it just about perfect with scale, positioning, cropping, etc. Then I tried an additional change that ended up making the video worse but wasn't able to figure out a way to undo that last change. I tried clicking the circular arrow in the lower left corner when cmd+Z didn't do anything, thinking maybe that was the icon for undo, but unfortunately that undid all the adjustments and reset the video to how it was when I first loaded it. Thanks!