Using the remote control in gaming mode
Use the A/V source button 
on your remote control to toggle through source modes: PC mode, HDMI
mode, and composite mode. This button has the same function as the Source toggle button on the top left of the computer. If used while you are in gaming mode, the following buttons still affect PC mode:
A/V — Switches source (PC, HDMI, composite)
Volume — Affects the volume of the PC as well when changed in gaming mode
Mute — Mutes sound in games and on PC
Media Center — Automatically switches back to PC and opens Media Center
Power — Returns the system to PC mode, from where you can then place the system into Sleep mode or shut it down.
Returning to PC mode from gaming mode
To return to PC mode from gaming mode:
Press the Ctl, Alt, Del buttons simultaneously on the keyboard
Press the Sleep button on the keyboard or remote
Press the Power/Sleep button on the computer
Press the Media Center (Start) button on the remote
Press the TouchSmart button on the computer
24User Guide (Features may vary by model)