Star formation scaling relations studied here colour-coded by the median equivalent width of H_α (W_Hα, upper row) and morphology (lower row), from left to right SFR-M_*, SFR-M_mol, and M_mol − M_*. In the left panel, the elements follow Fig. 5; additionally, the dotted lines are spaced of 3σ from each other. In the middle panel, the black solid line indicates a constant molecular depletion time τ_dep = 2 Gyr, additionally, dotted lines show constant τ_dep from (top to bottom) 10⁻⁵ to 10⁷ Gyr. In the right panel, the black line indicates a constant molecular gas-to-stellar mass f_mol = 0.1; additionally, the dotted lines show constant f_mol from (bottom to top) 10⁻⁵ to 10⁴. The triangles in the middle and right panels illustrate galaxies for which upper limits for the molecular gas mass are used. At the bottom right of each panel the typical (median) uncertainty for the quantities is shown. In the upper row, the pentagons show the positions of the wAGN-hosts in the sample, while the stars show the positions of sAGN-hosts. In the lower row, the dark blue dots show the locations of the SAB/SB galaxies. Spiral star-forming galaxies on the one hand and early-type retired galaxies on the other hand describe well-defined relationships across the three diagrams.