Membership flags – 2: in conservative locus with 3σ confidence, 1: in standard locus with 3σ confidence, 0: not in locus with 3σ confidence, –: not placed in relative diagram. Flags refer to loci (or criteria) defined in the following planes, from left to right: r-Ha vs. r − i (IPHAS), R-H_α vs. V − I (IPHAS), R-H_α vs. V − I (Sung et al. 2008), R-H_α vs. R − I (Lamm et al. 2004), H_α(EW) vs. V − I, H_α(FWZI) vs. V − I (Bonito et al. 2020), J − H vs. H − K, [3.6]–[5.8] vs. [4.5]–[8.0] (Spitzer), W1 − W2 vs. W2 − W3 (WISE), ⟨RV⟩ vs. G, PM_Dec vs. PM_RA, PLX vs. G, i − z (PS1) vs. [3.6]–[4.5] (Spitzer), X-ray detection (1/0/–: detected/not detected/not in FoV)

Field flags – 1: in standard locus with 2σ confidence, 0: not in locus with 2σ confidence, –: not placed in relative diagram. Flags refer to loci defined in the following planes, from left to right: r-Ha vs. r − i (IPHAS), R-Ha vs. V − I (Sung et al. 2008), R-Ha vs. R − I (Lamm et al. 2004), H_α(FWZI) vs. V − I (Bonito et al. 2020), G vs. BP − RP, I vs. V − I, I vs. R − I, J vs. J − H, K vs. H − K, J − H vs. H − K, [3.6] vs. [3.6]–[4.5], [8.0] vs. [4.5]–[8.0], [24] vs. [4.5]–[8.0], [3.6] vs. [3.6]–[24], [3.6]–[5.8] vs. [4.5]–[8.0], W1 − W2 vs. W2 − W3 (WISE), ⟨RV⟩ vs. G, PM_Dec vs. PM_RA, PLX vs. G, G – DM vs. BP − RP, r vs. r − i (PS1)

The sample(s) the stars belong to: ‘b’, ’c’, and ‘c-wide’ (indicated by the letter ‘w’).