Is there a command in Home Designer Pro 2017 where you can put a shed roof over the entire front of the house and have the walls adjust automatically so this is one continuous roof? For example, my house consists of three wall planes in the front elevation. The front of the garage, the front of the entryway, and the front of the master bath. However, I'd like to cover it with one continuous roof, sloping up to a ridgeline. It would seem you should be able to draw a roof manually over each area, say join roof planes, and you'd be done. However, this does not work. I understand that my walls have to change heights to do this, and I guess it's dependent on ceiling height, but I don't want to go changing and guessing at the ceiling heights everywhere to get this job done. I only want the exterior wall heights to adjust as needed with the wall furthest out being the "master" wall and then the other two wall heights should automatically adjust and go higher as necessary. As far as I'm concerned, the ceiling can stay the same as planned, and the extra height can get put into the attic.
Attached is an example of what I want to do. However, for the example I manually made the rooms the right size so it would work. I don't have that luxury with my real plan.