From left to right: continuum intensity, LP, CP, and LOS velocity relevant to the data acquired during the three Hinode/SP raster scans. The sub-FOV is the same as the blue box shown in Fig. 1. The black/white contours represent the edge of the umbra (I_c = 0.6) as seen in the continuum intensity. The light green contour in the first continuum and LOS velocity maps indicates contour at 0.1 LP/I_c. Arrows, ovals, and boxes point to regions and features described in Sect. 3.2.