Ahh gotcha, I’ve got 8 GB of ram on a core i5 with a typical project size being around 15 MB; most recent video is only 4 MB with no plugins, and only 200 layers, but I’ve done videos that were 30 MB, 900 layers, with tons of plugins (Plexus, Trapcode, etc.) – the undo function seems to act the same, at least for me, regardless of how much is in the video. All good though, thanks for the clarification.