Association matrix for NIX. The crosses indicate the nominal combinations of filters and stops allowed (which may differ slightly from those offered in a given observing period). The colours denote observing modes: short wavelength imaging (dark blue), long wavelength imaging (dark green), imaging with a neutral density filter (grey), focal plane coronagraphy (mauve), sparse aperture masking (light blue), focal plane coronagraphy (orange), long-slit spectroscopy (red), and closed light path (black). Other combinations would have to be set manually from the engineering panel.