See also:

Recirculation Control
When outside air contains smoke, odors, or high humidity, or if rapid cooling is desired, you may wish to recirculate interior air by pressing the Recirculation control button. Recirculation ...

Listen To An Audio Source On Channel 2 While A Video Is Playing On Channel 1
Ensure the Remote Control and Headphone switch is on Channel 2. ...

Controlling The iPod Or External USB Device Using Radio Buttons
To get into the iPod /USB/MP3 control mode and access a connected audio device, either press the “AUX” button on the radio faceplate or press the VR button and say USB or Switch to USB . Onc ...