Karamba cross-section Optimization

Hello everyone.

I'm new to Karamba and I'm wondering if it is possible to optimize the cross-section of a shell, but not by picking from a list of standardized cross-sections.

The picture below is that of the attached example file from Karamba.

I have three questions:

1) How can you visualize the chosen cross-section from the Optimize Cross Section component?

2) Can Karamba perform an optimization on the cross-section, in order to obtain a freeform cross-section?

3) If yes, can Karamba also vary this freeform cross-section along the length of the bridge?