X–Y maps of stars of different metallicities compared to the ISM’s one. Over-plotted in grey lines are the spiral arm locations, as estimated by Castro-Ginard et al. (2021). The colour codes are as follows: density for all selected stars with Z_max< 0.25 kpc (column 1), eccentricity for the stars with a maximum orbital distance from the plane (Z_max) of 0.25 kpc (column 2), eccentricity for stars with Z_max between 0.25 and 0.5 kpc (Column 3), and ages of the stars from columns 2 and 3 (Columns 4 and 5). The age colour bar for the last row has a different range (from 5 to 9 Gyr) to better reflect the older ages, on average, of the extreme LMR stars.