Breaking an open concept living area with invisible walls to get room sizes?

[bdillard]

Hello,

 

There are no walls between my kitchen, living room and kitchen table area.    They are definable by layout but since there are no walls,  how do I specify the areas so that the room sizes are automatically calculated?

 

Thanks.

[Rpadge]

There is a room divider wall type that you can use.

[bdillard]

Thanks!   Works like a charm!