Try the following solutions:
- Press the Aspect button on the remote control to select a different image aspect ratio.
- Make sure your computer's resolution setting is correct.
- Set the projector's Resolution setting to Auto so the projector automatically identifies the resolution of the input signal.
- You may need to modify existing presentation files if you created them for a different resolution. See your software documentation for specific information.
Related references
Changing the Image Aspect Ratio
Supported Video Display Formats
Input Signal Settings - Signal Menu