How do I view photos as a slideshow with an Apple G3?
I'm assuming the iMac G3 has Preview so you can do it with that. Just select all of the photos you would like to view as a slideshow and open them. Then click on View in the menu and choose view as slideshow or you can use the keyboard shortcut - Shift-Cmd-F
If not - what OS version are you running?
Didi you find the Nancy's suggestion helpful. Let us know