Viewing the XO screen in sunlight and adjusting the volume
The top row of the XO keyboard has three long buttons.
The long button on the far right controls the lighting and sound on the display.

The left two keys control the lighting.
- Press the small sun key to dim the backlight; press this key repeatedly to put the display into black and white mode, which saves power.
- Press the large sun key to increase the brightness of the backlight; press this key repeatedly to go to color mode.
The two keys on the right of this long button control the sound.
- Press the small audio symbol to decrease the speaker volume, which also saves power.
- Press the large audio symbol to increase the speaker volume.