Hi there. I am very green to this program. I am trying to draw a loft on a second story building with different heights of walls and a shed roof. I can make a shed roof, I can expose the ceiling, I can change the default heights for the room, but I do not know how to make different wall heights to create a half story or loft. This is for a tiny home, and the wall heights need to be 8' on the high end and 4' on the short end. Thank you in advance for helping me.