When doing edits on bases with friends, we often end up deciding we don't like something, but we've done too much otherwise to get rid of it, and we can't remember what the sketch looked like. Basically, the idea would be like in a Google Docs or Google Slides, where you can go back and see previous edits. If we wanted to "restore" those edits, that version could be put onto a new drawing in the sequence. This would also be good if any vandalization happens to peoples art! :]

A history page for edits made by people or just general previous versions, that way you can see what's going on or what had happened previously

Every few hours a back up of a canvas will be saved. Admins can use them to rollback canvas to what it used look like

So if you accidentally covered your entire color layer in brown, you could just restore a past version :)

give option to revert the page to a previous version in case of a large mistake/deletion that cannot be recovered. That or an option to undo other people's work as an admin so that people cannot grief?

So we can restore what we accidentally deleted and the "undo" button wont fix.