Hello everyone,
I am getting ready to replace my SE app with a Multi-Folio app, for the iPhone do I need to add screen shots for each device, 4.7", 5.5", 4" and 3.5"? Thanks.
Yes, in iTunes Connect you need to upload the required screen shots. In App Builder, you need to specify additional app icons and splash images. See this page for App Builder requirements: Digital Publishing Suite Help | Checklists for custom viewer apps