Problem to have floor in 2 stories house

[joloboff]

Hi,
I am designing a 2 stories house. The ground floor is OK.
I have created the walls of the first floor in the next tab. No problem.
But there is no floor in the 3D view ! [:(]
The floors is removed and one can see through. I want to assign texture to the 1st floor and see it!
In the Plan->Modify Level... menu, I have tried multiple combination
of elevation and floor thickness. Nothing works !
Also, in this house there is a mezzanine, the first floor does not fully cover the area of the ground floor. How can I create the dimensions of the mezzanine ?

Thanks for help !

[hansmex]

Did you create a room (une piece, en francais)?
Without creating rooms, no floor/ceiling will be visible.

Do you want this answer also in French?
Or maybe in German, Spanish, Dutch, Russian and Japonese?

Hans