Different Depths?

[Sarterixa]

I could just be kinda dumb, but how exactly do you build off the structures that are further back from the main bridge?  Actually, I understnad how to build off them, I just dont' understand how I would link those to my bridge to support it.  Anyway, because of this I'm stuck on complex lev 10 or something.

[Volmarias]

Mind you, you must press "R" to get back into place. Its no good to place a cable to the space between the supports :P

Ok, assuming you're building from a support point behind your bridge.

You pick a material, click that point, hit 'f' to move back (the point should stay highlighted), then click the place you want to link it to.

Hope this helps/makes sense  :-)