Undoing and Redoing
Nuke generally gives you an undo history that extends back to the first action of the application’s current session.
• To undo an action in the workspace, select Edit > Undo (or press Ctrl/Cmd+Z). Repeat as necessary.
• To redo an action in the workspace, select Edit > Redo (or press Ctrl/Cmd+Y). Repeat as necessary.
• To undo a change in a properties panel, click the Undo arrow button in the properties panel.
• To redo a change in a properties panel, click the Redo arrow button in the properties panel.
• To undo all changes made after the properties panel was opened, click the Revert button .
OR
Right-click on the properties panel and select Revert knobs.
• To set all controls back to their default values, right-click on the properties panel and select Set knobs to default.