Clearing the Undo Queue

To manually clear the Undo Queue

Click the Options pop-up menu and choose Clear Undo Queue.

Other operations that clear the Undo Queue include:

Deleting a track, or clearing a clip from the Clip List

Selecting Select > Unused, or Select > Unused Audio Except Whole Files in the Clip List menu

When the number of operations in the Undo History reaches the maximum level of Undo, performing another undoable operation removes the oldest operation at the top of the Undo History queue. When the oldest operation is one operation away from being pushed out of the queue, it is shown in red.