Benq W1080ST Benutzerhandbuch

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  Positioning your projector
size screens. The projector can be adjusted (using the zoom control) to display on these different screen 
sizes at the projection distance. Be aware that these different screens have different vertical offset values.
If you place the projector in a different position (to that recommended), you will have to tilt it down or 
up to center the image on the screen. In these situations, some image distortion will occur. Use the 
Keystone function to correct the distortion. See 
 for details.