“I moved some stuff from one page to another, but when I tried to undo, it didn’t come back.”
Each page has its own undo. From inside each page, you can only undo edits that happened in that page. If you move some information from one page to another and then change your mind, you can undo the operation by performing two undo operations: one in each affected page.
Undoing mistakes
If you drag some information from one page to another and find that you missed, say, the group header, you can’t add the group header by undoing in the second page, because the second page never had the group header. But if you accidentally delete the group header in the first page, you can undo in the first page to get it back.
