Setting Up Your Document
Part of the creation process for a tablet app is to set up your file properly. If you’re creating a document, InDesign CS6 has a new intent in the New Document dialog box: Digital Publishing.
The Digital Publishing intent sets a primary text frame, which allows your text to reflow when you create alternate layouts. It also sets the Pages panel to display alternate layouts. Dimensions are set to pixels, pre-set page sizes for a number of popular mobile devices are listed, and the Swatches panel is set to RGB colors. Any of these settings can be changed, of course, and they can be captured for future use with the Save Preset option.
Keep in mind that many devices have an area that is used for navigation. For example, the iPad has a 6-pixel wide area on the right side of the screen that displays a scroll bar and crops the layout. You can download templates for the iPad that have guides to indicate parts of the screen that will be covered by the scroll bar or other parts of the interface at http://gilbertconsulting.com/resources-misc.html.

Pre-set page sizes in the New Document dialog box include several popular mobile devices.