OOPS

Undo / Redo (UNDO/REDO) LEFT CLICK Allows you to undo the last modification on the picture. (Key:'U') RIGHT CLICK Allows you to redo the last modification undone on the picture. The maximum number of UNDO that you can perform can be defined in the settings menu. Undo/Redo aren't effective after page switching, picture loading and picture size modifications. (Key:Shift+'U')