Evolution of ¹⁹F at the surface (F_s) and at the centre (F_c) of a 120 M_⊙ star for different metallicities and rotations, as indicated in each panel (in arbitrary units). The evolution of the total mass (M_tot) and the mass of the convective core (M_cc) are also shown. The gray dashed lines indicate the end of the core H-burning phases. The upper panels show models at LMC metallicity, while the lower panels show models at solar metallicity.