How did you switch between floors? I am trying to design my auto shop, which datacad is sweet! I dont know how to get off the first floor, I need to build the second floor too. Thanks!
If you are using layers, either turn off the first floor layers and draw the second floor.
or, lock the first floor layers and trace it on your second floor layers.
or, "copy to layer" your first floor information to your second floor layers.