The InFocus IN138HD supplies keystone correction for picture alignment. Push the "Keystone" button about the handheld remote control or the projector and make use of the arrow buttons to adjust the keystone until the picture appears rectangular and with no distortion. Push the "Source" button over the remote control or https://andyfztkw.madmouseblog.com/8675782/manual-article-review-is-required-for-this-article