The complete question: "Little problem with colouring symmetry objects. I have 3 molecules in the asymmetric unit -A, B and C- and their symmetry mates are completely intertwined (P2). I would like create green symmetry objects as I move about the unit cell without having to worry whether they arise from A, B or C. I can do "paint_object bsb a12 sym1" and colour sym1 related to molecule A, but what about all the other combinations, e.g. sym2 from A, sym1 from C etc. ?"

Concatenate the PDB files of molecules A, B and C; then do:

  O > sam_at_in abc.pdb abc
  O > mol abc ca ; end
  O > sym_setup ...
  O > sym_obj ...
  O > paint_col green
  O > pai_object abc
  O > ^abc
  O > mol a ca ; end
  O > mol b ca ; end
  O > mol c ca ; end

Now the object ABC should be green (but not visible), the symmetry object of ABC (all operators) should also be green, whereas the reference molecules A, B and C should have the default colours.