Highlight of the stacked maps of CG pairs for each richness bin at angular scales of lower that 50 arcsec. The maps are for bins 1 to 5 in the panels from left to right, and top to bottom. Bottom-right panel: highlight for the total case. The colour scale was chosen to improve visibility of the individual CG pairs and is the same for all panels. The two concentric circles (white dashed lines) indicate the radii of ∼10 and ∼25 arcsec.