Ok, so I'm about to ask something that I know is going to be extremely simple, but I just can't find a solution anywhere. I'm making a slideshow in iMovie, and I've got all my photos in there right. I've just added a music track from iTunes. When I play the slideshow, the song finishes about 20 photos before the end. I simply want to shorten the average length of each photo so both music and photos will finish at the same time. Thank you.