| nNuclei | 
          Number of nuclei to calculate hyperfine structure for.
            Leave
            this at 0 unless you want the hyperfine structure simulated. | 
        
        
          | Jmin | 
          Minimum J to use in calculation - set to -1 (default) to
            use
            value from the species. | 
        
        
          | Jmax | 
          Maximum J to use in calculation - set to -1 (default) to
            use
            value from the species. | 
        
        
          | Colour | 
          Colour - set to "None" to take value from elsewhere as
            explained in Determining Colours
              and J ranges. | 
        
        
          | JAdjustSym | 
          If set, energy
            level plots and Fortrat diagrams will take account of the
            alternation
            in symmetry with J.
            For
            linear molecules
            a given energy level will typically alternate between + and
            - parity
            with J
            (hence the e/f notation). Note that
            this should
            be set to False
            if
            simulating hyperfine structure as otherwise confusing
            results can be
            obtained. 
           | 
        
        
          | BlockMatrix | 
          Set to
            force check of Hamiltonian matrix for factorization into
            blocks before
            diagonalization. If blocks are found, these are diagonalized
            separately, ensuring states that have no connecting matrix
            elements are
            not accidentally mixed if the eigenvalues happen to be very
            close. In
            principle, if full use is made of symmetry and states are
            separated
            into separate manifolds as appropriate, this should not be
            necessary
            but can easily happen if selected terms in the Hamiltonian
            are zero or
            interactions between states are omitted. 
           | 
        
        
          | Symmetric | 
          Set true if the molecule has a centre of symmetry, and g
            or u must be specified for individual states. | 
        
        
          | SymWt | 
          Statistical weight of symmetric rotational levels. Ignored
            if
            no centre of symmetry. See Making a
              linear
              molecule data file for how to set this up. Note that
            any nucleus
            for which hyperfine structure is to be calculated should not
            be
            included in calculating the statistical
            weights.  | 
        
        
          | AsymWt | 
          Statistical weight of asymmetric rotational levels.
            Ignored
            if no centre of symmetry. | 
        
        
          | RSquaredH | 
          Set to use the R2
            Hamiltonian rather than the
            default N2
            form. | 
        
        
          | ShowJ | 
          Show J in state label. | 
        
        
          | ShowOmega | 
          Show Omega in state label. | 
        
        
          | ShowN | 
          Show N in state label. | 
        
        
          | ShowFNumber | 
          Show F Number in state label. | 
        
        
          | Showef | 
          Show e/f symmetry in state label. |