Samsung SDP-9000DXR User Manual page 19

Using the presenter
Choose the video source with the INT/EXT button of the presenter.
Open the image on the computer. Now you see the image through a PC monitor or a projector.
• Each time you press the button, the display shows
EXT1 OUT, EXT2 OUT, INT OUT.
• EXT1 OUT, EXT2 OUT
View the image from an external VGA output device
through a PC monitor or a projector connected to the
digital presenter.
• INT OUT
Choose this mode to show the image through the lens of
the digital presenter.