Left panels: overlay of the continuum emission (I_cont; contours) on the velocity-integrated CO(3–2) maps (I_CO; linear color scale) of the central Δx × Δy = 100 pc × 100 pc regions of NGC 5506, NGC 5643, and NGC 6300, derived from their ALMA HSR datasets. Color scale spans the range [3σ_CO, ] in units of Jy km s⁻¹. Contour levels have a logarithmic spacing from 3σ_co to 90% of the peak continuum inside the displayed field-of-view () in steps of ∼0.18 dex on average. Right panels: same as left panels but showing the overlay of the velocity-integrated HCO⁺(4–3) contours (I_HCO⁺) on the CO(3–2) maps. Contour levels have a logarithmic spacing from 3σ_HCO⁺ to 90% of the peak HCO⁺ intensity () in steps of ∼0.08 dex on average. Markers and lines are as defined in Fig. 13.