Upper panels: map (cyan contours and colour scale) of the 1.3 mm dust continuum distribution for HL Tau (left) and IRAS 04302+2247 (right) discs. First contours and steps are 3σ (200 μJy beam⁻¹, HL Tau; 115 μJy beam⁻¹, IRAS 04302+2247), and 200σ, respectively. The ellipse in the bottom-left corner shows the ALMA synthesised beam (HPBW): 0′′. 28 × 0′′.25 (PA = –7°), for HL Tau, and 0′′.28 × 0′′.22 (PA = –3°), for IRAS 04302+2247. Middle panels: spatial distribution (moment 0) maps (white contours and colour scale) of the o-H₂ CS(7_1,6–6_1,5) line based onthe velocity integrated emission (3–11 km s⁻¹, HL Tau, 2–10 km s⁻¹, IRAS 04302+2247) overlaid on the continuum maps (cyan contours). First contours and steps are 5σ (7.5 mJy beam⁻¹ km s⁻¹, HL Tau, and12.5 mJy beam⁻¹ km s⁻¹, IRAS 04302), and 3σ, respectively. The ellipse shows the synthesised beam (HPBW): 0′′.29 × 0′′.27 (PA = 2°) for HL Tau and 0′′.30 × 0′′.26 (PA = 2°) for IRAS 04302+2247. Lower panels: moment 8 maps (white contours and colour scale) of the H₂ CS(7_1,6–6_1,5) based on the same velocity integrated emission used for the moment 0 maps, overlaid on the continuum maps (cyan contours). First contours and steps are 5σ (3 mJy beam⁻¹ km s⁻¹), and 3σ, respectively.