thank you for the neat app. However I think I found a bug. I have a file with 6 layers and 50 frames and at some point Undo action (ctrl z) became very slow. like really slow.. 🙁 you click undo and going to make a coffee or read a couple of articles.
I have win 10 home edition and AP v 5.0 Alpha 6.1
At the same time if I create a new file and start drawing the Undo is normal.
Can you tell me a little what you did before it happened? And was it going increasingly slower over time or did it happen suddenly – so it was fast at one undo and then suddenly slow at the next? What was it you were trying to undo?