Hi Antonino, some other people may be able to give you different ideas, but you have to use an additional CAD program along with MoI to create those kinds of drawings right now.

Rhino works well for this since MoI and Rhino use the same file format and data can be transferred directly from MoI into Rhino.

For version 1.0 MoI is focused just on the creation of the 3D model data.

- Michael