Cutouts of the stacked images. These cutouts correspond to our 10^9.5 < M_*/M_⊙ < 10¹⁰ (left), 10¹⁰ < M_*/M_⊙ < 10^10.5 (center), and 10^10.5 < M_*/M_⊙ < 10^11.5 (right) stellar mass bins, including (top) or excluding (bottom) the ALMA primary targets. The number of stacked galaxies is given in each cutout. The red dashed ellipse shows the ALMA synthesized beam. Color scales are similar for a given stellar mass bin. Each cutout has a size of 4″ × 4″.