Left panel: HH212 protostellar system as observed by ALMA-Band 7 (Codella et al. 2014). Blue and red contours plot the blue- and redshifted SiO(8–7) jet overlaid on the continuum at 0.9 mm (black contours). Positions are with respect to the coordinates reported in Sect. 2. The filled ellipse shows the synthesised beam (HPBW): . Central panels: zoom-in of the central region as observed by ALMA-Band 7 Cycle 1: ¹³CH₃OH(13_0,13–12_1,12)E and CH₂DOH(9_0,9–8_1,8)e0 integrated over ±4 km s^-1 with respect to the v_sys = + 1.7 km s^-1, (black contours and grey scale). First contours and steps are 5σ for ¹³CH₃OH (15 mJy beam ^-1 km s^-1) and CH₂DOH (35 mJy beam ^-1 km s^-1). The HPBWs are (PA = −64°) for ¹³CH₃OH and (PA = −65°) for CH₂DOH. Right panel: zoom-in of the central region, as observed by ALMA-Band 7 Cycle 4, showing the ¹³CH₃OH(12_1,11–12_0,12)A emission integrated over 10 km s^-1 around v_sys (black contours and grey scale). First contours and steps are 5σ (20 mJy beam ^-1 km s^-1) and 3σ, respectively. The HPBW is (PA = −88°).