The Calendar Monthly view displays one month in a calendar format. This view does not have the scheduling function buttons. To access these functions please use a weekly schedule view. This view can be grouped by Position or Category.
Change Layout options - Note that the account main manager settings in this view's "Change Layout" window will also set how "Everyone's Schedule Monthly" is displayed for employees.
You can use the first "Change Layout" option to group shifts by Category (instead of by Position). This is an example that has some Categories set up: