Example of the PARSEC evolutionary track of an intermediate-mass star (m = 2.4M_⊙ and [Fe/H] = −1.30) in the photometric system of Gaia. Numbers P1–7 correspond to the starting point of each evolutionary phase encoded by colors, as explained in the legend (together with the age interval of each phase indicated). The subscript “0” in the axis labels denotes that no reddening has been applied. The dashed line represents an evolutionary track (within 665 Myr) of a BSS of 1.57 M_⊙ and [Fe/H] = −2.3, which is formed by the merger of two MS stars of 0.8 M_⊙ (Sills et al. 2009).