vertikally streched space

[Michael K�nig]

Hello,
when I use pmx or mtx and have more the x systems, the space between the
systems will be streched vertically.
I know this is a feature and not abug, but I don't like this behaviour and
think it is very annoying.

Is there a possibility to stop this "buggy.feature"?

Thakns, Michael

PS: By the way, I think mtx and pmx are great.