Evolutionary tracks in the log (g) vs. plane for the 7, 9, 12, 15, 20, and 25   M_⊙ rotating models (from right to left) at Z = 0.002. The observational points are SMC stars observed by Hunter et al. (2007; blue squares: MS stars; red circles: post-MS stars). Typical errorbars are indicated on the bottom-right corner: 0.2   dex in g_surf and 1000   K in T_eff (corresponding to the smallest error shown at log   (T_eff) = 4.6 and to the biggest one at log   (T_eff) = 4.0.