Distribution of the z-component of the specific angular momentum in the face-on projection ((x, y)-plane) at different times for the thin- (left panels), thick- (middle panels), and thin+thick disc particles (right panels) for the model rthickE0.5. The dotted lines denote the contours of the total (thin+thick) surface density. The dashed black circle in each sub-panel denotes the extent of the bar.