Spatial distribution of 4742 Leo II stars selected according to their position, sharpness, and photometric error (0 < r_ell < 0.19 deg, |sharp|< 0.1 and sqrt(σ_B² + σ_V² < 0.07)). The red and blue circles show the locations of RRab and RRc type stars, respectively, with empty symbols indicating objects with poor light curves. The ACs are indicated as orange triangles, while V190, with uncertain classification, is highlighted with a purple diamond. V88, the likely BL Her variable star, is indicated with a dark green star. The black squares around the other symbols indicate newly discovered or re-classified variable stars. The solid and dashed ellipses indicate respectively the position of the half-light (2.46′) and tidal (9.82′) radii from Muñoz et al. (2018b), assuming the centre, position angle, and ellipticity derived in Sect. 2.1. The two green squares show the location of the two HST/WFC3 fields.