Top panels: (from top to bottom; left panels): zeroth (intensity), first (velocity field), and second (velocity dispersion) moment maps of the ALMA CO(2−1) data of NGC 4968. Central panels: same as the left panels but for the best-fit model constructed with 3D BAROLO. Right panels: same as the left panels but for the residual (data model). The black cross denotes the centre of the galaxy. The major axis of the molecular disc is shown by a dashed black line in the velocity map. The yellow ellipse in the bottom left corner of the data velocity map shows the synthesised beam size (0.27″ × 0.22″) with PA = 245°. North and east directions correspond to top and left, respectively. Bottom panels: p − v diagrams extracted from the data cube (solid blue contours) and model cube (solid red contours) along the major axis (top panel) and along the minor axis (bottom panel). The contours level of both the data and the model are at [1,2,4,8,16,32,64]*l, where l = 0.0012. The rotation velocity of each ring of the best-fit disc model is represented by the solid yellow dots in the top panel.