Lexus GS 450h 2008 Owner's Manual page 230

3-1. Using the touch screen
Adjusting the display
Press
STEP 1
Adjust the display as desired using
STEP 2
If you do not touch the screen for 20 seconds, the system will return to
the previous screen.
With CD player
With DVD player
Color
Tone
Contrast
Brightness
228
.
/
Red
Lighter
Weaker
Darker
/ and /
/
Green
Darker
Stronger
Brighter
.