The gamechangers made it look so easy. I can put a platform in a room but as soon as I let go of the platform tool I can't select the platform again, the whole building goes up and down on a foundati...
I've now made 3 builds with platforms & have learned to be very careful clicking the up & down arrows in the platform tool. Also, to have a divided platform it works if you make one section of your house a room then use the platform tool & you can delete the inside wall to make it more open. For example, the kitchen & livingroom.