(a) Image created by overplotting the side-on view of four sticky-chaotic orbits with initial conditions close to x1v1 periodic orbits at four different energies. (b) Same image including also four 3D quasi-periodic orbits around x1. The isodensity contours in both cases indicate the support of an OX-type profile. Density increases from top to bottom on the colour bar at the right of the figure.