Darn, well at least I know now, thanks for that!
I will ask fxtec for the tool, and maybe can reverse-engineer it enough to make it work. It actually would be nice to be able to control the margins - by default, it is a little overzealous in that if you are holding the phone in your hand it's hard not to accidentally be touching a screen edge, which blocks all other touches from working. So a little bit of margin, but not too much, would be good. Probably not possible to reverse-engineer things enough to achieve that level of control, though, without ridiculous effort.
I can't put my