[Ifeffit] non-standard space group P 21/n

Dear all does anyone know if is it possible to create with ATOMS the non-standard space group P 21/n ? Space group keywords are listed at the atoms website http://iffwww.iff.kfa-juelich.de/icp/atoms/atoms.sgml-7.html#ss7.4 but no keyword for P 21/n group is available. Thanks for any suggestion. Best regards, AS