In iOS 7, Apple quietly added new keyboard shortcuts to some of its apps and gave developers the capability to add their own. So if you use a Bluetooth keyboard with your iOS 7 device, be sure to bookmark this list of shortcuts that Federico Viticci is working on. Since there is no official documentation from Apple, Viticci is learning them by trial and error, as well as from reader submissions, and he will update the list as he learns more. follow link
Expose Shortcut for View All Windows
In Expose mode in Snow Leopard, press the Tab key to view all windows belonging to one application (equivalent to pressing F10 or Control-F3 on recent laptops). Press Tab again to switch between applications while remaining in Expose. You can also click an icon in the dock.
- ExtraBITS for 11 November 2013 (11 Nov 13)
New Keyboard Shortcuts in iOS 7