Thanks for the quick help everybody,
for the moment i'm fine with the double-click (i'm working on windows right now), but i don't think that it is very intuitive neither, i bet there are many users out there, who just don't get how to do it ... I think dragging the separator and scrolling automatically would be the best, francly ... :?
and thanks for the STLfilt info, was'nt looking for anything like that, but now i will ...
regards
nausea