Fraction of 2P stars as a function of radial distance from the cluster center. The radial scale is provided both in units of the half-light radius (R_h = 2.9 arcmin; 2010 version of the Harris 1996, catalog) and in arcminutes. Diamonds, crosses, and large dots represent results derived from HST, combined JWST and HST, and Euclid data, respectively. Results from this study are shown in black, while the fraction of 2P stars determined by Milone et al. (2017a) for RGB stars is depicted with a light-red diamond. Horizontal lines indicate the radial range associated with each determination of the 2P fraction.