All polygons/polyhedra in JSV are made up of triangles!
You may use the menu: Polygons for manually adding individual polygons/polyhedra. No symmetry equivalent polygons/polyhedra will be generated in this case. A certain order has to be followed in which to type in the atom numbers at the corners of the desired polygon/ polyhedron. This is necessary, in order to ensure that the correct triangles are generated with the correct vertex order (counter-clockwise), since a triangle is only drawn when its normal faces towards the viewer.
Below the vertex order for are listed. These numbers have to be replaced with the actual serial numbers of the atoms but in the given order!