I have used afcad for some time with great results, and have recently been working on 'new' airports. After positioning runways and taxiways, I have laid a 'grass' polygon to enclose the whole area and then drawn apron polygons on top of this.
I now find that the apron polygons do not show up. Is this because afcad does not support layers or is it something else I have missed?
If it is the former, can I flatten my airport area and add a standard fs ground texture over the area and then in afcad just add my apron polygons and if so, what is the best way to do this?

Many thanks