1. Go into > Core > School > School & Grade Levels
  2. Click the Edit icon for your School
On the General tab, it will have how your courses are organized. Courses are organized by department if not all courses are associated with a single grade level. Typically, Upper Schools are organized by department. Courses are organized by grade level if all courses are associated with only one grade level.
Note: The Department Picker can be organized by grade or by department but not by both at the same time. This is currently listed as an Idea in the Ideas Portal.