Position-velocity diagrams found along the equatorial direction of the lines observed with ALMA in the Red Rectangle. Contours are, as usual, the same as in the corresponding channel maps. To help in the comparison of the different diagrams, we show (red dotted lines) approximate indications of the central position and systemic velocity of the nebula (horizontal and vertical lines) and of the distributions of the emission of gas in Keplerian rotation (hyperbolas).