Magnetic topology for a dipole configuration showing the co-spatial and co-temporal QSEB and UV brightening in Region 1. Panel (a) presents a 3D view with the north limb pointing up, the QSEB close to the photosphere, and the UV brightening at the top of the loops, slightly offset towards the north limb. Like in Fig. 4, the grey-scale image in the bottom is the B_LOS map, and the higher image is the Hβ wing image with the QSEB in light blue and white shades. In this (and subsequent) 3D visualisation(s), the UV brightening in SJI 1400 is shown as a yellow patch. Panel (b) shows a top view of the loops, QSEB, and UV brightening. The yellow arrow shows the direction towards the limb.