"If your page scrolls, you should have some indication that your page scrolls." That's my approach. I don't think scrollbars are entirely necessary (and in a s

"If your page scrolls, you should have some indication that your page scrolls." That's my approach. I don't think scrollbars are entirely necessary (and in a slide-to-slide webpage like this, having a scrollbar wouldn't really work since it'd break the UI), but having some indicator that you can scroll is necessary. It doesn't necessarily have to be a scrollbar though. Having content peeking out from beneath the fold is often enough to let the user know, "Hey! There's stuff down here! Scroll and check it out!"