Box Overview. Chrome + Last.fm free music player = awesome. What is Sanebox? What is Prezi? - The official intro video. How to create a stunning background effect in Prezi.com. Prezi Viewer for iPad. Prezi Tutorials: How to Prezify your PowerPoint Slides. Tutorial2: Grouping and Layering. Prezi Tutorials: Selecting a preset Theme. Springpad Chrome Browser Extension - Overview.