In the Edit Alternatives window, select an alternative from the list, then do either of the following:
To rename the alternative: Click Rename, then enter a new name.
To delete the alternative: Click Remove.
You cannot remove the Main alternative.
Click Done.
In Logic Pro, choose File > Project Alternatives, and choose a different alternative from the list.
If you have made changes after you last saved the current alternative, a Save dialog appears, so that you can save your changes in the current alternative before switching to a different alternative.
In Logic Pro, choose File > Revert to, and choose a backup from the submenu.
In the Revert to Backup dialog, click OK.