The system maintains a history of schedule actions, which you can view from the Manage Schedules dialog box. The History tab displays the components that were updated, the modification type, the old and new values, the user who made the modification, and the change date. The information on this tab is read-only.
If the schedule status is Pending or Open, select Actions, and then Edit.
If the schedule status is Closed or Locked, select Actions, and then Properties.