Samsung SyncMaster XL20 Owner's Manual page 11

Power Cord
Others
Calibrater
Front
MODE button
(= Color Mode)
DVI Cable
Cradle
Press this button to select a Color Mode. Continuing to press the
button, will repeatedly display the setting modes. With the control
buttons at the front of the monitor, you can easily implement
different color information matching your environment.
USB Cable
(A-B Type cable)
Hood