BenQ HT3550 User Manual - Page 15

Adjusting the projected image Adjusting the projection angle If the projector is not placed on a flat surface or the screen and the projector are not perpendicular to each other, the projected image becomes trapezoidal. You can screw the adjuster feet to fine-tune the horizontal angle. To retract the feet, screw the adjuster feet in a reverse direction. Do not look into the lens while the lamp is on. The strong light from the lamp may cause damage to your eyes. Fine-tuning the image size and clarity Adjust the projected image to the size that you need using the zoom ring. Sharpen the image by rotating the focus ring. Correcting keystone Keystoning refers to the situation where the projected image is noticeably wider at either the top or bottom. It occurs when the projector is not perpendicular to the screen. To correct this, esides adjusting the height of the projector, you can use Auto Keystone or Keystone manually correct it following one of the these steps. • Using the remote control or projector Press on the remote control or / on the projector to display the Keystone correction page. Press to correct keystoning at the top of the image. Press to correct keystoning at the bottom of the image. When Keystone OSD Press / . Press / . pops up, long press OK for 2 seconds to reset Keystone. When Keystone OSD pops up, long press PIC MODE for 2 seconds to enable Auto Keystone. Positioning your projector 15