Applying a slide transition effect
In the Tasks pane, choose Slide Transition.
In the Slides pane or Slide Sorter view, select the slides to which you want to apply the transition. If you want the transition to apply to all slides, you do not need to select them first.
In the Apply to selected slides list, select a transition.
Modify the selected transition by changing the speed or adding a sound, in the Modify transition area.
If you choose to play a sound, select it in the Sound list. The Loop until next sound checkbox now becomes active. Select this checkbox to play the sound repeatedly until another sound starts.
Choose how to advance to the next slide: manually (on mouse click) or automatically. If you choose automatically, you can specify how long the slide remains visible before it automatically advances to the next slide.
If you want the effect you just defined to apply to all slides in the show, click the Apply to All Slides button.
To preview the transition effect, click the Play button.
To start the slide show from the current slide (so you can see all the transitions), click the Slide Show button.
Task pane, showing Slide Transition page.