bto 17CL817 Guide Utilisateur Concis page 26

Volume (Basic Setting)
The Volume icon will show the current volume level. You
can use the dial to adjust the volume or the Fn + F5/F6
key combinations, or use the Fn + F3 key combination to
mute the volume.
Caps Lock/Scroll Lock/Number Lock/Airplane
Mode (Basic Setting)
Click the button to toggle the appropriate lock mode and
Airplane Mode.
KB Sleep Timer/KB Brightness (LED Device)
(For White-LED Keyboards)
Enable and then select the amount of time for which the
system is idle before the keyboard LED enters sleep mode
(i.e. the LED keyboard illumination will turn off to save
power). You can also adjust the keyboard brightness.
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Fan (System Monitor)
You can set the fan speed to Maximum (full power), Au-
tomatic or Custom from this menu item. The fan speed
will adjust itself automatically to control the heat of the
CPU/GPU. You can use the Offset slider to adjust the set-
tings to your preference. However you can adjust the set-
ting to Maximum if you prefer.
The Custom setting allows you to click and drag on any
of the 2 midrange nodes on the graph in order to adjust the
temperature parameters of the CPU Fan or GPU Fan.
All these settings can be overidden by the system, as a
safety precaution, if it requires heavier use of the fan.