I get a base of planes whose object space is made up of 3D objects (there are crazy people anyway). How to transform them into a "classic" drawing that can be modified with the classic commands.
Finally I tinkered: - export of 3d volumes in iges (you need a complete Autocad or even Mechanical); - import into SW; - Drawing with the views that interested me; - export in DXF; - Import of the DXF into an empty AutoCAD file; - Copy and paste as a block in the paper space in the plan to be modified.