Hi I Have a Pi 3 running openplotter (http://sailoog.com/en/openplotter) and a 7" 800x480 touch screen. the desktop displays top to bottom but only about 80% from left to right. BUT the tough screen thinks the desktop is the whole screen (i.e. if it tap top left it is in the right place but if I tap off the desktop top right it puts the curser on the edge of the desktop. I have tried disabling overscan but no good. The screen is small to begin with I want to be able to use the whole thing!