Thanks. I have tried a couple of the suggestions and am still not figuring it out. I have been playing with it and using the reference material. I will try watching some videos. I am using Home Designer Suite.
For example, it does not matter if I have Surfaces checked in the dimension preferences or not. If I draw a room that I want to be 5ft square on the inside, I get a 5 ft square room on the outside walls and a 4'3" square room on the inside. I have to add 8 inches to each wall to get a 5' sq room on the inside. That is easy when doing a square room, which I am not doing. My room has all sorts of nooks and crannies and trying to figure out when to add for wall thickness and how much is driving me crazy.