Rotational splittings δν for modes of the dipole forest near 190 μHz for models of KIC 8366239 computed with different initial velocities on the ZAMS (V_i in km s^-1) and viscosities (ν_add in cm² s^-1) corresponding to an additional mechanism for the transport of angular momentum in radiative zones. The bottom panel shows the rotational splittings normalised to the splitting of the mode at the centre of the dipole forest. The dotted horizontal lines indicate the observed values of both the mean rotational splittings of modes at the centre of the dipole forests (top pannel) and the ratio of the splittings of the first modes in the wings of the dipole forest to the splitting of the mode at the centre of the forest (bottom panel).