View of the cluster members of Abell S1063 (left) and MACS J1206.2−0847 (right). The gray scale background image on the left (right) is the WFI (SUBARU) observation in the R_c band spanning an area of ≈25 × 25 arcmin². The member galaxies are plotted as colored dots. The colors correspond to the stellar mass values of each galaxy as reported in the color bar. The three concentric yellow circles represent the distances of 1.5, 3, and 4.5 Mpc (1, 3, and 5 Mpc) from the cluster center identified with the BCG. The green rectangle represents the ≈1 × 2 arcmin² (≈1 × 2.63 arcmin²) area covered by the MUSE spectroscopic follow-up on the inner regions of the cluster.