Spatial distribution of old (age >  2 Gyr) RGB stars and young (age ≲ 100 Myr) bright blue stars in NGC 5238 (left) and UGC 8760 (right). RGB maps are background-subtracted, and only pixels above a level of 3 times the background standard deviation (given by the vertical black segment in the colorbars) have been set to non-zero to mask density peaks due to red background galaxies. The blue points are individual young stars. H I contours at 1, 2, 4, 8 M_⊙ pc⁻² (same as in Fig. 1) are superimposed to the star count maps. North is up, east is to the left.