Samsung SP-L200 Owner's Instructions Manual page 16

Installing the Projector
Install the projector so that the beam from the projector is perpendicular to the screen.
Place the projector so that the lens is at the center of the screen.
If the screen is not vertically installed, the picture on the screen may not be a rectangle.
Do not install the screen in bright surroundings. If the screen is too bright, the picture on the screen will not be displayed
clearly.
When installing the screen in bright surroundings, use curtains.
You can install the projector in the following locations: Front-Floor / Front-Ceiling / Rear-Floor / Rear-Ceiling.
(To view the installation position
To view the picture when installing the projector behind the screen,
Install a semi-transparent screen.
Select Menu > Setup > Install > Rear-Floor
To view the picture when installing the projector in the front of the screen,
Install the projector at the side where you are watching the
screen.
Select Menu > Setup > Install > Front-Floor
Zoom and Focus Adjustment
Zoom Knob Focus Ring
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Basic Settings Connecting the Power
settings)
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Connecting an External Device
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