Spatial distribution of our sample stars in 30 Dor. Luminosity subclasses are indicated as follows: blue circles for O V stars, red triangles for O Vz stars (including those with doubtful V/Vz classifications), and green squares for O IV stars (including V–III and III–IV classes). The central and southwestern orange circles (with adopted radii of 2.́4, see e.g. Sana et al. 2013) indicate the approximate extent of NGC 2070 and NGC 2060, respectively.