Same as the upper panel in Fig. 6, but comparing the contributions from different field components. Top: effect of the poloidal field , which predominantly affects high-latitude layers presumably via magnetic pressure gradients. Bottom: effect of the azimuthal field B_ϕ(r,z) component, contributing to super-rotation outside the reversal at r = 10 kpc and providing weak pressure-support in the outer disc away from the midplane.