I think what you want is: http://manual.koha-community.org/3.16/en/administration.html#OPACURLOpenInNewWindow which is only for the OPAC, but is at least a start.
Nicole _______________________________________________ Koha mailing list http://koha-community.org Koha@lists.katipo.co.nz http://lists.katipo.co.nz/mailman/listinfo/koha