How to change the footprint of a buildable shell?
I'd like to make my own buidable shell, but I didn't understand well that thing about floor levels and the footprint, or the size, the whole part of the floor where I will can build on.
I was looking at some buildings at TSR Workshop, and on the first-upper level, it says "Elevetion offset - 27", and it is the 11th floor. Also, the footprint says "MaxX: 9,23619, MaxZ: 8,23619, MinX: -9,20245, MinZ: -10,2024".
What does it mean? How do I know how many tiles on the floor is this number?
Thank you.