If projecting from a computer, press the Auto button on the remote control. Also make sure the image Position setting is correct in the Signal menu. See Adjusting Signal Settings.
Check the projector’s Resolution setting. See Adjusting Signal Settings. Select Normal or Wide, depending on the size of your computer’s display panel.
Make sure your computer is not set to display an extended desktop or dual display.
Press the Esc button on the remote control to cancel the E-Zoom function.
Make sure your computer’s resolution setting is correct. Ideally, it should be 1280 x 800 to match the projector’s native resolution for the PowerLite 826W, or 1024 x 768 for the PowerLite 825 or 85. If this option isn’t available, select one of the other compatible video formats. See Compatible Video Formats.
You also may need to modify existing presentation files if you created them for a different resolution. See your software documentation for specific information.