Influence of convective boundary mixing at different boundaries during the core He-burning phase on the blue loops of a 5 M_⊙ star. During the previous central hydrogen-burning phase the nonlocal TCM1 was applied. The four cases I-IV are indicated above the corresponding panel. The blue and red lines represent the blue and red edges of the instability strip, respectively, as estimated by Deka et al. (2024). The core He-burning region is color mapped by age. The green solid and dashed lines indicate the evolutionary tracks with and without nonlocality applied to the entire evolution of the star, respectively.