The tool bar along the top allows you to perform additional operations in the Image Editor:
Undo. Every time you make a change in the image, the Editor saves a copy of the old image. If you don’t like a change you have made, you can press the Undo Button, and the old image will be restored. The program save the last 10 changes so you undo 10 changes.
Copy and Paste. These Tool Bar buttons allow you copy and paste images to and from the Windows Clipboard.