Tracks in the Hertzsprung-Russel diagram for the different values of α_ov and no extra envelope mixing (log(D_env/cm² s⁻¹) = 0) (left panel) and for the different values of log(D_env/cm² s⁻¹) for a fixed value of α_ov = 0.2 (right panel). The different colours indicate the different values for the CBM and the envelope mixing. In the left panel, the grey line shows the non-rotating model from Brinkman et al. (2021) with α_ov = 0.2. In the right panel, the rotating models with initial rotational velocities for 150 and 300 km/s are added as a comparison for the different treatment of envelope mixing. The blue line is the same model in both panels. Only the model with log(D_env/cm² s⁻¹) = 6 shows a significant difference from the other models with the same amount of CBM, while even a moderately different α_ov produces a discernible shift.