I have searched and thought I had found the right setting to control. But it did not work. I have a Sony GW KF 50XBR800 and I think I need to adjust the vertical Keystone. at least the diagram of what that controls looked right. With a geometry grid from DVE the top of the picture is narrower than the bottom. I guess it looks like a trapezoid. I found that for other Sony's it is the PPHA setting within 2150D that control that, but this tv does not have the 2150D and the PPHA references I found in the 2170D did not do anything to fix this. Anyone who could help me would be doing me a great favor. I have the tweak guide for the tv from here, but I did not see the reference to setting keystone. Thanks so much.