Gas mass plotted against SFR (left) and ratio of gas mass and stellar mass plotted against sSFR (right, in logarithmic units). In both panels, the MAGMA sample has been divided into three M_star bins (M_star ≤3 × 10⁹ M_⊙, 143 galaxies; 3 × 10⁹ M_⊙ < M_star <  3 × 10¹⁰ M_⊙, 210 galaxies; M_star ≥3 × 10¹⁰ M_⊙, 39 galaxies). The binned medians for M_H2 are shown by orange circles and M_HI by purple squares; only bins with number of galaxies ≥4 are plotted. The low-M_star bins are connected with dashed lines, the high-mass bins with solid ones, and the intermediate bin with dot-dashed; the hatched area shows the spreads of the intermediate M_star regime. The shaded regions correspond to ±1σ spreads of the binned parameters. In the right panel, only the highest and lowest M_star bins are shown.