Selects the 3D model on which it is working to create longitudinal or cross profiles.

If a 3D model is selected and it is wished to change it then apply once more this command.

The entities accepted for representing the 3D model can be of type:
• 3Dface;
• PolygonMesh;
• PolyFaceMesh.

For the entities PolygonMesh the number of faces of the model is given by the variables AutoCAD SURFU and SURFV