Running Mtn Lion, with iPhoto 11, I've created multiple shared photo streams, but when we view them on the website the photos appear in a collage layout. I'd like to change that to either a slide show or to a list where each photo is by itself.
You can't change the collage layout. It's just an indication of what's in the collections of photos. When you click on a photo it will come up full sized and you can scroll thru them with the arrow keys on your keyboard or the cursor.