To insert a section of a 3D object in the profile, select the Insert Sections of 3D Objects command (31E3).
In the following dialog box select the element name you want to insert in the profile, and press OK.
In this case, it is important, that the 3D object crosses the alignment.
If a 3D object does not cross the alignment, you can display it in the profile with additional 3D polylines, drawn as a part of a 3D object. Set this 3D polylines as Projections lines with the command Define Projection Line (21M3). In the next step insert these Projection lines in profile with the command Draw Projection Lines (31E2).
Inserted section of a 3D object in the profile view (pipe).
Inserted 3D object in the profile view (pipe).