Samsung SyncMaster 400MPn User Manual page 91

To prevent after-images on the screen you can use this function, so that every minute pixels on the
LCD are moved in horizontal or vertical direction.
1.
Off
2.
On
Horizontal Dot
MENU → → → → ENTER → [Setup] → → → → → → → → ENTER → [Safety
Screen] → ENTER → [Pixel Shift] → → ENTER → [Horizontal Dot] → , → ENTER
Sets how many pixels the screen moves horizontally.
Five adjustment levels: 0, 1, 2, 3, and 4.
Vertical Line
MENU → → → → ENTER → [Setup] → → → → → → → → ENTER → [Safety
Screen] → ENTER → [Pixel Shift] → → → ENTER → [Vertical Line] → , → ENTER
Sets how many pixels the screen moves vertically.
Five adjustment levels: 0, 1, 2, 3, and 4.
Time
MENU → → → → ENTER → [Setup] → → → → → → → → ENTER → [Safety
Screen] → ENTER → [Pixel Shift] → → → → ENTER → [Time] → , → ENTER
Adjusting the LCD Display