How do I adjust the backlight of my ZOWIE CELERITAS II?

The default backlight is the brightest.
Press down keys:
- Fn + F8 (To decrease the backlight)
- Fn + F7 (To increase the backlight)
Copyright @ BenQ Corporation. All Rights Reserved.
This website is best viewed using Internet Explorer 11 , Chrome , Firefox, Safari and other newer browsers version.