Low temperature emission measurements were performed at atmospheric and high pressures in KZnF3:Co2+. Comparing the zero-phonon line positions and using the phonon dispersion relation of the host material, the fine structure in the emission spectrum was identified. Pressure coefficients were obtained for several among the emission lines from which the values for zero-phonon lines were deduced. Analysis shows that the spin-orbit parameter changes with pressure are negligible in this material.