Acer X241 Service Manual page 32

OSD menu
Contrast:
This adjusts dark and light shades of color relative to each
other.
Brightness:
This adjusts the brightness of the picture on the screen.
Focus:
This removes any horizontal distortion and makes the picture
clear and sharp.
Clock:
If there are any vertical stripes seen on the background of the
screen, this renders them less noticeable by minimizing their
size. It also changes the size of the horizontal screen.
H-Position:
This adjusts the horizontal.
V-Position:
This adjusts the vertical.
Color adjustment:
There are three ways to adjust color:
Warm (reddish white)
Cool (bluish white)
User (you can adjust the colors red, green and blue to the
intensity you desire)