Setting the Environmental Controls in the Classroom Select "ENVIRO" from the Main Menu. Lights The lighting controls are located on the left side of the Crestron Touch Pad. Switch the lights on and off using the "ON" and "OFF" buttons. Select a lighting scheme depending upon your needs by touching "GENERAL," "CONFERENCE" or "AV." Projector Power on and shut off the projector from the Crestron Touch Pad. Select the source to be projected: touch either "PC" for a computer presentation or "VIDEO" for a video or DVD presentation. Shades Control the Solar shades with the Open, Close and Stop buttons. Control the Blackout shades with the Open, Close and Stop buttons. Program Volume Control the Program volume with the Up, Down, and Mute buttons on the right side of the screen.