Karamba - internal forces - free body diagram

Hello,

I'm making a bridge in gh with a parameter on a given position depending on the forces in that given position. I could calculate the internal forces from the free body diagram and put them as a f(x, horizontal position) in gh. But ideally, karamba can give me these results. Can it? I can't find anything about it.

This is the kind of diagram i'm hoping to get out of karamba.

http://fsinet.fsid.cvut.cz/en/U2052/img827.gif

or does someone know a shortcut?

Thanks a lot!