I know this is probably VW 101 but what are the differences in layers and classes.
I get a .dwg from a producer of the ballroom layout with all sorts of classes ( rigging, chandlier, soffet, lighting, stage, chairs, etc...)
I create a layers ie truss, lights, lights floor, curtain etc...
When I export back to dwg this all goes into a layer titled none.
thanks
tim