Looking good.
But a useful feature is missing: a connector line between the anchor point of the zone and the zonestamp.
It happens often when the zonestamp doesn't fit in the room, it is needed to draw a connector line.
It could be automatic: when the zonestamp is placed out of the room, the connector line should appear.
Why is this essential? Of course it's not essential (you can draw a line manually), but it would be more comfortable to have an automatic feature like this. Because if you move the zonestamp, you have to move the line manually, also; and this is not a big job, but with several zones, it could be forgotten.
Actually I could write a zonestamp gsm script for this feature, if I could get the coordinates of the anchor point and the zonestamp in the gdl script.
Talmácsi, István, architect (AC user since 1997, ac4.5 - now: ac18)