Which figure? Victoria has a dial to move them inside the head, Michael might too (I'm unsure). On the Posette and the Dork you have to find (or make) a smoothing morph, as the eyebrow is physically part of the head mesh. The above takes care of the mesh, stage 2 in all cases is set the "eyebrow" material to white, so the texture map can paint the right color on this part of the figure.