Figure 3.

The CrystalExplorer21 graphical window, showcasing an HS (transparent) surrounding a urea molecule in its crystal environment (CSD refcode UREAXX01), alongside its corresponding fingerprint plot. Neighbouring molecules, corresponding to the highlighted interactions, are also present in the view. O⋯H and H⋯O contacts have been highlighted, demonstrating the link between the regions of the HS and the corresponding values on the two-dimensional fingerprint plot. The coloured fragment patch is decorated with the d _norm property, and the vectors joining the oxygen atom inside the surface to the two hydrogen atoms outside of it are seen to go through the centre of the red-coloured d _norm spot.