Sometimes when editing a project you inadvertently make a change which is different from what you had intended. If you make this type of change, the "Undo" facility will restore your project to the state it was in before you made the change.
To undo a change, select "Undo" from the Quick Access Toolbar. PhotoModeler will undo the effects of your last change and update the computer's display. The “Undo” tool icon changes to a “Redo” icon and when clicked will redo the change that was just undone.
Not all changes can be undone. If a change can be undone, the Undo tool is selectable, otherwise it will be dim.