Chaotic regions of the spin-axis dynamics for exoplanets of the GJ 3293 system, maximised with the method presented in this paper. The colour code is the same as in previous figures. The bounds for their precession constants are, from left to right panels: α_max = 66, 20, 6.2 and 1.2 deg yr⁻¹ (corresponding to maximum rotation periods of a few hours). For each exoplanet, the horizontal line shows the precession constant corresponding to a rotation period equal to the orbital period (obtained from the method of Sect. 3.3). They are, from left to right: 13, 31, 48 and 123 days.