Quiet Sun photospheric magnetic flux and associated coronal magnetic structures. Top panel: an AIA 193 image (rotated at 180 degrees with respect to the image in Fig. 1). Middle panel: magnetic field lines from a potential field model overplotted with VAPOR on an HMI LOS magnetogram. Bottom panel: HMI LOS magnetogram. Arrows numbered 1, 2, 3, 4, and 5 point at bright small-scale loop systems. Arrow 6 indicates a faint loop, and arrow 7 (shown only in the middle panel) points at a large loop that is not detectable in AIA 193, but can be seen in AIA 171 (not shown here).