Apple Logic Pro 8 - Manual (Page 178)

178 Chapter 8 Basic Operations
To open the Undo History window:
m Choose Edit > Undo History (or use the corresponding key command,
default: Option-Z).
The Undo History shows you a list of all actions that can be undone. The most recent
step (editing operation), which will be the first to be undone, is selected.
To undo or redo multiple steps:
m Click on any entry to undo or redo all steps between the clicked and highlighted
entries.
To undo or redo an isolated step:
m Command-click on the desired step.
This will undo or redo an isolated step—without influencing all steps between the
clicked and highlighted entries.
To erase the Undo History:
m Choose Edit > Delete Undo History.
Warning: Please take care with this command. No undos or redos are possible for the
deleted steps, once the Undo History has been erased.