How to draw second floor (second level) following walls of the ground floor (first level)

[sabrina_at]

Hello everyone, this is my first post here, love to use SH3D.

There's one thing I'd like to do, please forgive me if it's already been asked I didn't find what I'm looking for.

My house is an old farmhouse on two levels.

To draw each level I imported the technical drawings to use as a guide. But they don't match exactly, so now I have some discordance on walls between the two levels.

The building is so old that walls aren't straight, the second floor has been added in a second time by the old owners and the rooms are not specular to the ones on the ground level.
What I wanted to do is to draw the second level using the ground (first level) as a guide but I don't know how. Something like seeing walls of the first level but drawing on the second.

Is this possible?
Many thanks in advance!

[Puybaret]

Hello,
You should already see walls at the lower level as shown in the user's guide and the help. Isn't it the case?

[sabrina_at]

Hello, thank you very much, I can't see walls of the ground floor through the second level. I just downloaded and installed new version, I will try again!

[Puybaret]

Maybe you create some intermediate levels?