Samsung UF-130DX Software User's Manual page 12

Image Adjustment
Lamp Button
Device Control
10
Performs automatic color adjustment.
When pressed, toggles between image mode and text mode.
Performs automatic focusing.
Turns the lamp on.
When the button is pressed, the light of the digital presenter is turned off.
Convert an input image to an internal/External image.
When pressed, the freeze function is toggled on or off.
Control Activate: When the PIP panel(OS mode) turned off, this button is enable.
If you want to use PIP panel or control button, you would press this button.
(UF-130DX only)