In Pictures: 10 tips for giving killer presentatio...
9. Use the zoom tool sparingly.
Even the minds behind Prezi admit that the presentation tool's zoom function takes a little getting used to. Use it too often and you run the risk of making your audience seasick. Make sure to zoom in and out only a few times over the course of your prezi.
If you're worried about overuse, choose a prezi template that isn't reliant on zoom to tell a story. On the templates menu, templates like "The Journey," "The Big Idea" and "Explain a Topic" are good choices if you have an itchy zoom finger.
In Pictures: 10 tips for giving killer presentations with the new Prezi