iPhoto 9.5: Create a slideshow
You can create two kinds of slideshows:
Instant slideshow: To very quickly showcase a selection of your photos—with a theme, music, and transitions—you can create an instant slideshow. If you show the same selection again, the same settings apply. However, you can’t change the photos included or customize the slideshow further.
Saved slideshow: For more control over your slideshow, you can create a saved slideshow. With a saved slideshow, you can reorder photos, modify transitions between photos, add text to slides, add the Ken Burns effect, and more. A saved slideshow appears in your Source list so that you can play it and change it at any time.