Boss Audio Systems Car Stereo System BV8966B 사용자 설명서

Image mode: You can choose the area in the
broken line on the panel, standard, defined, 
soft, according what you need to choose,
the blue back light will disappear.

You can choose: Brightness, Contrast, Color, 
Hue, adjust the image effect according to 
your sight. The blue bar will show your level. 

Video mode: When using this
function, the position will be darker 
on the screen.