To assign a transition effect to selected slides with the dialog box

1. Select the slides to which you want to assign the transition effect.

2. Click the Transition button in the ribbon. The Transition Effects dialog box opens.

3. Choose the transition settings that you want.

4. Click Apply to assign your transition choice to the selected slides.

5. Click Close to close the dialog box.

The effect, direction, and speed you choose are demonstrated in the preview.