Can you put an "UNDO" button FMV? Just so you can UNDO one move? To many times I have accidently mad a merge of 3 or 4 of something when I did not intend to do so. Being able to just UNDO that would be nice. I am not talking about infinite undo-undo-undo. Just go back one move. Then when you make another move, it lights back up, you can erase your latest move, then it goes back of until another move is made, and so on and so on. Thank you!