NEC VT570 User Manual page 35

3. Projecting an Image (Basic Operation)
Zoom
VT670/VT570/VT470
VT670/VT570/VT470
Use the ZOOM lever to finely adjust the image size on the
screen.
VT47
VT47
Use the Digital ZOOM button on the projector cabinet to
electronically enlarge or reduce the image size.
NOTE: Digital Zoom can cause result in a blurry image because
zooming is made electronically.
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Focus
Use the FOCUS ring to obtain the best focus.
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