Use the following tabs on the bottom of the Schedule tab of the Backup Manager to customize your Grandfather-Father-Son rotation jobs.
Rotation Rules-Customizing rotation rules which differ from the predefined Grandfather-Father-Son Rotation schemes.
Calendar View-Customizing individual days in the Grandfather-Father-Son Calendar view.
Exceptions-Defining particular days on which the back up type and the execution time or date differs from the pre-existing schemes. You can also select specific days off.