Distribution of the General sample in the J_R − L_Z diagram colour coded according to density (upper panels), median maximum distance above the Galactic plane Z_max (second panels), median metallicity (third panels), and median [α/Fe] (lower panels). The grey boxes in the left panels indicate the areas for which a zoomed-in version is shown in the right column. The contour lines of the zoomed density plot are included in the right column as a visual reference, while the tentative positions of the ridges are denoted by the dashed lines. Bins with less than ten stars are omitted in the zoomed density plot to enhance the gradient in the colour code. The position of the LSR at (J_R, L_Z) = (0, L_⊙) is denoted by the star symbol.