Similar to Fig. 1 in Schunker et al. (2019). High-resolution (0.35 Mm per pixel) time-averaged line-of-sight magnetogram maps of AR 11066 (left), AR 11158 (middle), and AR 11414 (right). These high-resolution maps can be directly compared with the low-resolution maps in Fig. 1 in Schunker et al. (2019). The grey scale is ±1000 G. The black contour indicates the search area to identify the polarities in the high-resolution maps. The green triangle (circle) shows the position of the negative (positive) polarity identified using the high-resolution maps. The position of the negative (blue cross) and positive (red cross) polarities computed from the low-resolution (1.4 Mm per pixel) time-averaged line-of-sight magnetograms are shown for comparison.