Evolutionary tracks in the HR diagram at Z_init = 0.014. The main sequence is shown in thicker lines. Reference points defined in Sect. 4.1 are indicated by diamonds (ZAMS and TAMS) and filled circles (three reference points within the MS and one at the bottom of the RGB). For clarity, the tracks at stellar masses between 1.1 and 1.2 M_⊙ and between 1.2 and 1.3 M_⊙ are not shown. They are displayed in Fig. 4 for Z_init = 0.006 and 0.04.