A before and after slides for PowerPoint presentation are a great way to demonstrate a tangible impact that change can have on a particular situation. These slides can be useful to represent with a bridge metaphor a comparison in a situation before and after a change. In this metaphor, changes in behavior are represented by placing a bridge between two situations (the “before” situation), and then in the other side of the bridge represent the change (the “after” situation). A visual representation of these differences is often depicted by a bridge connecting two sides.