Apple Logic Pro X - Manual (Page 464)

Chapter 15 Advanced edit features 464
Undo edit steps
Most Audio File Editor functions are destructive, changing the files stored on your hard disk.
However, you can use the Undo feature if things do not go your way.
Compare (or undo) your edits with the original audio file
m Choose Edit > Undo (default key command: Command-Z).
Cancel a destructive edit that is in progress
m Press Command-Period (.).
The audio file will be retained in its original state, even if it appears that a portion of the editing
function has occurred.
You can configure the Audio File Editor’s Undo function in the Preferences > Audio > Audio File
Editor pane. For more information, see
Audio File Editor preferences on page 858.
Perform manual backups
Although the Undo History and standard Undo functions are available, try to get in the
habit of creating backups before processing or editing. This provides a safety copy of your
audio recordings in case something unexpected happens, due to a processing error or other
unforeseen event.
You can make manual backups of the file you’re editing, or replace it with a backup version at
any time, using a variety of functions.
Duplicate the audio file you’re working on
m Choose Audio File > Create Backup from the Audio File Editor menu bar (default key
command: Control-B).
A copy of the audio file (with the extension .dup) is created in the same folder as the source file.
Revert to a backup file
m Choose Audio File > Revert to Backup from the Audio File Editor menu bar (default key
command: Control-Option-Command-B).
This function completely replaces the current audio file with the backup (provided one exists).
Important: You cannot reverse this function with Undo.