Top and middle panels: wide-field (∼80″ × 40″) and zoomed-in (∼20″ × 10″) color overlays of 4.05 μm Brα (red), 1.64 μm [Fe II] (green), and 2.12 μm H₂ (blue) images of NGC 6537. Bottom: the same (∼20″ × 10″) FOV as the middle panel, with the 3.56 μm PAH image replacing Brα in the red channel. Images are displayed in log scale, with min and max intensities as in Figure 1, with further enhancements to highlight emission outside the core regions.