Median |Z| of the stars (orbital time steps) along Y-symmetric APOGEE orbits with |Z|< 0.75 kpc in the ring and disc (left; Ecc < 0.4) and bar (right; Ecc ≥ 0.4). The top six rows show the median |Z| of the stars in different age bins, while the last row shows the median |Z| of the total. The black curves show the orbital density maps built from all disc and ring stars and all bar stars. For other plot details see Fig. 2.