How to Import pictures and photos into Keynote presentations
Keynote can make your photos and images look amazing. It also makes them easy to work with. If you have, for example, four different file formats of different images, rather than dragging each of them into a presentation and trying to create a slide, you can grab all four and drag them right into the slide navigator and have full image slides ready to go. Just press play. For more, watch this friendly OS X tutorial.