Keynote's themes often include drop zones--areas where you can drop several photos of different sizes and have them formatted consistently, which will save you time when building your presentations. Find out how to add a photo to a drop zone in this tutorial. Watch more at http://www.lynda.com/Keynote-tutorial....
This tutorial is a single movie from the Keynote: From Outline to Presentation course presented by lynda.com author Rich Harrington. The complete course is 2 hours and 10 minutes and shows how to build and deliver a great Keynote presentation.