Available drawing styles for individual atoms are:

Value Description
stick Atoms and connected bonds are drawn using simple lines
tube Atoms and connected bonds are drawn using 'capped' cylinders
sphere Atoms and connected bonds are drawn using spheres and cylinders, with all atoms the same size
scaled Atoms and connected bonds are drawn using spheres and cylinders, with all atoms sized according to their atomic radius set in the preferences
individual Atoms and connected bonds are drawn according the local settings on the atom