Stacked Chandra grating spectrum of Capella in 5.0 – 14.0 Å (wavelength region divided by panels) fit with model 1 (ultimate model from paper II, blue) and model 2 (file model plus multiple Gaussian components, red). The relative discrepancies between model 1 and model 2 are shown in the lower panel. The selected lines of interest are marked with thin vertical lines. The numbers on the top are the associated line IDs (see Table A.1 for details), the colors of the numbers indicate the dominant line formation process: black - direct excitation; red - radiative cascade; blue - dielectronic recombination.