Redoing and undoing

To undo an action press and hold the control key (CTRL) and press Z from now on this will be represented as CTRL+Z

After undoing an action if you change your mind you can press CTRL+Y

Just a word of caution although most actions can be undone I may have missed some stuff. It is recommended to save a project file regularly to avoid any accidents. Also Retro Graphics Toolkit supports “unlimited” history if this uses too much ram you can clear it by using the undo/redo menu clicking on “Clear undo buffer” without the quotes.