1,The ability to display multiple structures simultaneously and to perform
least-squares overlay of pairs of structures
2,The ability to manually edit structures including the addition of
hydrogen atoms, the addition of bonds, the editing of bond types and the
removal of atoms, bonds and molecules
3,The ability to automatically assign bond-types, standardise bond-types to
Cambridge Structural Database conventions and to add missing hydrogen atoms
4,The ability to display Bravais, Friedel, Donnay and Harker (BFDH)
theoretical crystal morphologies。