There's nothing worse than forgetting to make a duplicate page, start deleting and adding new bits of the new map you want to create, then suddenly realize that this was the original map of the page your wanted to keep, and now you have ruined it... A page revert button would fix this, as it could save the page in a save slate after you launch the game, then if you mess up, you simply hit revert page, and it reloads the page from the save slate back to what it was before you started messing with it. I did this just now... I forgot to make a duplicate page, unknowingly started to delete the items on the original map and got rid of assets from it, and added new ones in, which made it impossible to just hit undo 30/40 times, because the newer stuff was already on it. So this is why I'm suggesting something like this, to not totally do ourselves over with a bit of oversight.
