How does one create struc in the map editor?

[Szling]

How do you create struc in the map editor? I can find the settings to make structures grow it, but I cannot find how to create the "blueprint" for where to put the struc, could someone point me in the right direction(possibly using a screenshot)?

[Karsten75]

http://knucklecracker.com/forums/index.php?topic=21611.msg154892#msg154892