If the projector is not aligned correctly the image can be skewed and can cause key stoning. Key stoning refers to distortion of a projected image in which the top of the image looks broader than the bottom.
- Make sure the projector is flat on the desk or aligned perpendicular to the screen. If wall or ceiling mounted, make sure that the projector lies flat.
- Most ViewSonic projectors have a Keystone button on the Remote Control or on the Projector itself.