Hi Pilou, thank you for your reply...
you must make a "double copy" with "edges" of the volume for dimension it!
I'm sorry for my dummy request, but I'm new to DSM and I don't know how to get a copy with edges of the object and/or dimensions...
I'm able to dimension an object but what I see in the 3d pdf are only models bodies, not curves...

thanks again for your help
M
EDIT
@Pilou I can copy edges of the object and those are on 3D pdf,
but I cannot find a way to copy or project to sketch dimensions to obtain curves of dimensions...
It seems that in the DSM file the dimensions have to be converted to curves before been exported to pdf
here a picture from DSM forum:


thanks again for support