Comparison of circularity distribution in the outer regions at z = 0 and at birth. All panels are similar to Fig. 9, though stars at R_e < r < 5R_e are included in this figure. For galaxies in all mass bins, the stars in the outer regions are born cold, especially colder in galaxies with quiescent merger history in which they keep almost unchanged until z = 0; the stars are significantly heated in galaxies that have experienced more mergers.