NEC VT48 - Page 31

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3. Projecting an Image (Basic Operation)
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ENT
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Zoom
VT580/VT480/VT58/VT57
Use the ZOOM lever to adjust the image size on the screen.
VT48
Focus
Use the FOCUS ring to obtain the best focus.
VT580/VT480/VT58/VT57
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VT48
Use the Digital ZOOM button on the projector cabinet to
electronically enlarge or reduce the image size.
NOTE: Digital Zoom can result in a blurry image due to the
electronic zoom.