Click on a master slide in the Master Slides Organizer to display the master slide in the slide area (
Figure 3.2 ).
With the master slide displayed, you can then edit the master slide's layout. Changes that you make to a master slide layout will be applied to all slides that use that layout. You'll find more about changing master slide layouts in the "Modifying Master Slides" section later in this chapter, and in Chapter 13, "Creating Custom Master Slides."