Simulated Hα emission line as a function of stellar mass for the EWS-SF_sim selection. Top panels present the relation at the flux limit of F(Hα)≥2 × 10⁻¹⁶ erg s⁻¹ cm⁻² and with no cut in z_prob, whilst the bottom panels present the improvement obtained with our fiducial selection that also includes also a cut in redshift probability z_prob ≥ 0.99. The layout is the same as in Fig. 11, the only difference is that the black and cyan contours and dashed lines show the ground-truth distributions for the full EWS parent sample (H_E ≤ 24) and a subsample selected with F(Hα) ≥ 2 × 10⁻¹⁶ erg s⁻¹ cm⁻², respectively. Note: in this case, the bias between the cut in magnitude only and the cut in magnitude and flux limit is larger than the EDS-SF_sim one. Therefore, even with stacking, we are mapping scaling relations of galaxies with Hα flux above 2 × 10⁻¹⁶ erg s⁻¹ cm⁻².