To view a slideshow of pictures, open the event's folder, and then click the little white movie screen icon in the top left area of the screen. It defaults to 15 second intervals and thumbnails - you'll need to change the picture size to something more appropriate, like 800x800 or 1024x1024, depending on your screen's resolution.

Most of these images are ginormous high-quality pics. When looking at an individual pic in a folder, there's a small button under the pic that's a square with a diagonal arrow to another square, and if you roll your cursor over that it will say "Full Size". Yep, that's how to view the original image, suitable for printing and framing.