Images of the inner 12 × 9 arcmin² of NGC 2403 in multiple wave bands. The 3.6, 8.0, 70, 160 μm, CO J= (3–2) and H i images are the same as the images in Fig. 1 except that the images are cropped and that the colour scales have been adjusted to show greater contrast in the centre. The colours in the two additional CO J= (1–0) images [from the BIMA SONG survey and from the NRAO 12 m observations by Thornley & Wilson (1995)] are scaled linearly. The magenta box in the CO J= (1–0) image from the NRAO 12 m shows the region that was covered in the observations. Pixels with non-detections in the CO data are set to black. The cyan square indicates the location of VS 44, which is region 44 in the catalogue by Véron & Sauvayre (1965) and region 128 in the catalogue by Hodge & Kennicutt (1983). See the caption for Fig. 1 for additional information on the other symbols and lines in the figure.