Occasionally you may want to know the space group of a particular molecule. Interactively (for maps) you can see it using the Map Properties button in the Molecule Display Control dialog.
There is a scripting interface function that returns the space group for a given molecule 1:
(show-spacegroup imol)
You can force a space group onto a molecule using the following:
(set-space-group imol space-group)
where space-group is one of the standard CCP4 space group names (e.g. "P 21 21 21").
To show the symmetry operators of a particular molecule use:
(get-symmetry imol)
which will return a list of strings.