jimbo1
Welcome to the Apple Discussions.
How are you creating the Slideshow?
1. If it’s a quick slideshow where you simply select an Album and press play, then the setting you’re looking for is in the Settings Tab of the controller: as indicated:
2. If you’re creating a full slideshow using the ‘+’ lower left: then the setting is available when you click on the Setting button, in the All Slides tab
Regards
TD