a) Evolution of the modified tilt angle θ defined by Eq. (16)for multipolar dynamos as a function of Ra/Ra_c and Pm. Colour scale ranges from white (θ = 0) to black (θ = 0.7). b) θ as a function of Ra/Ra_c for Pm = 1. Upper x axis corresponds to the values of Ro_ℓ for the multipolar branch. The meaning of the symbol shapes is defined in the caption of Fig. 1. Error bars represent the standard deviations.