To the right of the tabs are the Undo and Redo boxes.
- Undo box: Click to undo the last operation. Alternatively, click the white arrow to list the last 10 operations performed. Selecting an operation from the list undoes all operations performed after the selected operation (including the selected operation).
- Redo box: Click to redo the last operation. Alternatively, click the white arrow to list the last 10 undone operations. Selecting one reapplies all undone operations performed before the selected operation.
The MediaHub, Conform, Timeline, Batch, and Tools tabs all share the same undo/redo stack, and are automatically switched according to the context of the last undo/redo operation. Commands such as Replace Desktop, Clear Batch, and Clear Desktop may also be undone.
The Undo levels may be set anywhere between 2 and 100 under the General tab in the Preferences. The default is 50.
Note: While in Batch FX, all undo levels are accessible. Upon exiting Batch FX and returning to the timeline, all operations performed in Batch FX are considered one undo level. This means that even if seven operations were performed in Batch FX, the undo affects all Batch FX operations at once.