All binned contrast vs. B_LOS curves from Figs. 3, 4, 7 and 8 of Paper I plotted together. Also plotted is the contrast of the 5250 Å line core obtained by averaging the intensities at the wavelength positions +40 and −40 mÅ from line core. The curves are identified by their color in the legend in the upper left part of the figure. The black dashed line marks the mean quiet-Sun intensity level, i.e., a contrast of unity.