3.5 Undoing and Redoing Commands ================================ Almost every DDD command can be undone, using `Edit => Undo' or the `Undo' button on the command tool. Likewise, `Edit => Redo' repeats the command most recently undone. The `Edit' menu shows which commands are to be undone and redone next; this is also indicated by the popup help on the `Undo' and `Redo' buttons.