Bob's input above is important and good. If you want to learn more about the DPS 2015 workflow, take a look at the tutorials and Quick Start Guide on the Trial Resources page: Digital Publishing Solution | Trial Resources Bob pointed to the DPS Preflight app, a way to check your content and app structure without building your own app. A great resource.If you've built interactivity (overlays) for the previous DPS system, they work the same way except panoramas aren't supported.HTH - Colin