Overview of the observation. Bottom row, left to right: continuum intensity in IR, integrated absolute Stokes V signal of 1564.8 nm, same for 630.25 nm. Top row, left to right: line-core velocity of 630.37 nm, NCP of 1564.8 nm, same for 630.25 nm. Tick marks are in arcsec. The black dashed line denotes the location of a cut along the neutral line of Stokes V. The white arrow points towards disc center. The black crosses and the corresponding numbers in the map of 630.37 nm denote the locations of the profiles shown in Figs. B.1 to B.3.