Each master appears in the master thumbnail previews in the left pane of the side master view. Slide and title masters are associated as slide-title master pairs with a line connecting the two masters.
Commands to work with slide masters can be found on the Slide Master View toolbar, in the shortcut menu when you right-click a master thumbnail, and in the Edit and Insert menus.
Each master is also shown in the Slide Design task pane in the Used in This Presentation section.
Each slide-title master pair is named, so that it can be easily identified in the Slide Design task pane and master thumbnail previews in a descriptive tip, shown in yellow when you point at a design or master.