How do I select an app using the Zagg Logitech Keyboard Case?

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heres a video to show you: http://www.youtube.com/watch?v=RCywj90tl7E&feature=player_embedded
The initial setup is easy. It's simply a matter of turning it on and pairing the Bluetooth connection. You're asked to enter a four-digit key code on the keyboard, so it's a nice, secure connection. A small plastic easel folds up and the iPad 2 slides into a plastic slot above the keys. The entire case is lined with rubber, providing padding and a secure friction fit when the case closed. Though it's only gravity holding the iPad down, it tends to stay put, even if it's moving about on your lap. To protect your desk from the aluminum surface and to give the case a non-slip feature, you can stick on the included rubber feet. The iPad 2 can sense the presence of the case and will automatically turn on when it's opened (you just pry the iPad out of the shell) and power down when it's closed. Unlike most other half-shell cases, however, you can't just stick the cover on the back of the iPad if you don't need the keyboard.

The Bluetooth transceiver gets its power from a rechargeable lithium-polymer battery that should hold up for weeks without a recharge (via the included USB cable). Just for fun, we paired the keyboard with our iPhone 4 and it worked just fine, freaking out a friend with epic-length responses to her texts.