Evolutionary tracks for 3, 4, 5, 6, 7, and 8 M_⊙ models of the O14_ML4h_RA set (with moderate MS core overshooting, f_H = 0.01, f_env = 0.04, and η_R = 0.4) for Z = 0.014 (left), Z = 0.006 (middle), and Z = 0.002 (right), and different initial rotation rates coded by color: gray for nonrotating models, then blue for W₀ = 0.3, orange for W₀ = 0.5, and red for W₀ = 0.65. Bottom panels zoom in on the blue loops of 6, 7, and 8 M_⊙ models. In the top panels we also include 5 M_⊙, W₀ = 0.5 tracks computed with a twice as large MS core overshooting parameter (f_H = 0.02, black dotted line) for comparison. The edges of the IS are plotted for reference.