Samsung 245T manualSOURCE

Menu	Description
Brightness	When OSD is not on the screen, push the button to adjust brightness.

SOURCE

Menu

SOURCE

Description

Selects the input signal while the OSD is off.

(When the source button is pressed to change the input mode, a message appears in the upper left of the screen displaying the current mode -- PC, DVI, AV, S-Video and , Component and HDMI input signal.)

Changing the source is only allowed for external devices that are connected to the monitor at the time.