Minimum orthogonal distance of each star from the six regions to the best fit for Mg-, Si-, and α-abundance vs. metallicity for each galaxy in Figs. 13 and 14 (MW, LMC, SMC, Fnx, Sgr, Scl, and GSE). The best fit was determined by Hasselquist et al. (2021) for Mg and Si, and by Nidever et al. (2020) for alpha-abundances. Each star from each region is represented by a filled circle and the mean for each region is represented by a filled star symbol (see Table 8).