Cutouts of 7 × 7 arcsec² of the ALMA low-resolution map showing the median stacked galaxies in each redshift and mass bin. For each bin, we include cutouts that correspond to the whole sample and the undetected data set, as defined in Sect. 2. The apertures used to measure the photometry are displayed in green. The size of the beam is shown in the first panel of the figure in gray. The flux densities and the corresponding uncertainties for each stacked galaxy are included in Table 2.