Showcase navigation is one of the simplest, yet most frequently used, navigation styles available to relational presenters. It's a back-and-forth movement between a switchboard slide and content slides, within a single PowerPoint slide show. Visit this link to learn more about Showcase navigation, or watch a video demonstration.
This short tutorial demonstrates step-by-step instructions for making a picture-based showcase presentation, using four pictures. The pictures are available by download, or you can use your own.