To set the slide transitions to the same value:

• Choose View | Slide Sorter.
• Click the first slide that you want to apply a transition to and then hold down Ctrl while you select other slides that will use the same transition.
• With slides selected, choose Slide Show | Slide Transition. Set your transition parameters and then click Apply.
• If you want to apply the same transition to all the slides in the show, forget about selecting slides, just set up your transition, and then click Apply to All.