View Group - Commands - Where Used

Task Tab> View Group
Command Name Where Used in PMBOK Guide
Gantt Chart Command down arrow displays pick-list
 - Gantt Chart - Custom       6.O2 Project Schedule
 - Gantt Chart - Built In  6.O2 Project Schedule
Task Tab - View Group - Gantt chart Command pulldown list

By clicking the pulldown arrow on the Gantt chart command will display a pulldown list or menu.  The current view is displayed with a check (tick) mark the the left of the View name.