MediaCentral | UX User’s Guide : MediaCentral | UX Mobile Application for the iPhone : Connection Basics : The iPhone
The iPhone
The iPhone has very few exterior buttons. You navigate content with touch gestures — for example, tapping an icon to start an application. Some gestures perform standard functions, such as displaying different menu icons, and some perform functions specific to an application.
 
Button
Description
The Home button wakes the iPhone when it is sleeping and exits applications, returning you to the home screen.
*Remember, the more applications that you have running, the more memory and battery power your device uses. To optimize the performance of your device, try to close applications when you finish with them.