Sharp PC-W100T Operation Manual page 22

Making Adjustments
You can adjust the screen brightness and sound volume to provide confortable
1
usage while operating the notebook.
Adjusting the Screen Brightness
Adjusting Sound Volume
Use the audio volume control (on the right side of the notebook) to adjust the
speaker volume. Turn it away from you to increase the volume, or towards you to
decrease the volume.
1-4 Making Adjustments
decreases the screen brightness.
increases the screen brightness.
turns the LCD backlighting on or off.