Position of the bins used for spectral stacking in this work in the SFR–M_⋆ plane. Each rectangle represents a bin, color-coded according to its median strong-line metallicity using the Pettini & Pagel (2004) calibration and extinction-corrected emission lines from the MaNGA DAP catalog. The number of galaxies in each bin is reported. In the inset in the lower right, our stacking grid is shown superimposed on the distribution of individual MaNGA star-forming galaxies in the SFR–M_⋆ plane. The integrated spectra, global and radially binned, are available online (see Tables B.2 and B.1).