About Undo and Redo
You can reverse or repeat any of the following actions you perform in MapBrowser using Undo and Redo keyboard shortcuts:Using the Undo and Redo shortcuts
Every action you perform is recorded, and that's how it's possible to reverse or repeat the last action you have performed. The maximum number of undo or redo actions you can perform is 50. When you reach the limit, the history will be automatically overwritten from the oldest entry.