Multimedia LCD Projector
Adjust the Screen Image
1.Adjusting the image size
Turn the zoom ring on the projector to adjustor to adjust the image
2.Adjusting the image height.
Extend or retract the front adjustable foot to adjust the height of the image.
3.Correcting Keystone Distortion
Use the [ 
Keystone] button on the projector's control panel. *Correcting vertical keystone distortion