I wrote a quick little program to help with positioning your DMD. You can download it here: http://pinballbulbs.com/files/pbfx2dotmatrix.zip Simply run this, move the window into position, size the window as you want it, click "refresh" to update the position controls, then hit save. If you need to rerun it again, just use open to locate the file and open it again. By default this opens/saves to the default steam directory. If you store your files elsewhere you'll need to browse to that directory (where pinball fx2.exe is located). This will create the dotmatrix.cfg file if it does not exist.