Windows Phone 7.5 has a lot of new features. One of favorites is its ability to navigate among recently launched apps. You can see how this is done in the video embedded above. You press and hold (long press) the back button at the bottom left of a Windows Phone devices held in portrait mode. This brings up a list of large icons representing recently used apps. Navigation is side-to-side. Tap any of the apps to bring it to the foreground for use.