Time evolution of contribution functions and plasma temperature for a column in the network patches at (x, y)=(3.8, 4.2) arcsec, marked as location B in the FOV maps (Fig. 1). Top panel: contribution function of band 3 with heights of 0.25 and 0.8 times the contribution function integrated from the top marked by the dashed and solid lines, respectively. Middle panel: same as the top panel for band 6. Bottom panel: plasma temperature with representative formation heights of bands 3 and 6 marked with dashed and solid lines, respectively. The formation height at τ = 1.0 of both sub-bands is indicated in the respective row to facilitate comparison.