Samsung SyncMaster 520DX User Manual page 78

Video Wall
Turns Off/On the Video Wall function of the selected display Off/On.
1.
Off
2.
On
Format
The Format can be selected to see a divided screen.
1.
Full
Provides a full screen without any margins.
2.
Natural
Displays a natural image with the original aspect ratio intact.
Horizontal
Sets how many parts the screen should be divided horizontally.
Five adjustment levels: 1, 2, 3, 4, and 5.
Adjusting the LCD Display