114 | Display-Settings ControlsDisplay-Settings ControlsUse the display settings controls to:• adjust volume• adjust screen brightness• select video source• turn off the screenThe functions of the controls vary when:• your computer is not connected to any video input or video output devices• your computer is connected to an external video input device such as an anothercomputer, gaming console, camera, Blu-ray player, and so on• your computer is connected to an external video output device such as a TV,monitor, projector, and so onNo external input oroutput connectedExternal inputconnectedExternal outputconnected1 decrease displaybrightnessdecrease displaybrightnessdecrease displaybrightness/volume2 increase display brightness increase display brightness increase displaybrightness/volume3 screen off input source select input source select1 32