Evolution of two typical test particles experiencing the ZLK mechanism (left), and both ZLK and 𝑔 = 2s mechanisms (right). Two orbits have different initial inclinations i = 33° (left) and i = 28° (right), and the rest initial orbital elements for both orbits are the same (a = 47.5 au, e = 0.3, Ω = Ω₈, ω = 342°, and M = M₈). From top to bottom, the panels show the evolution of semimajor axis (a), eccentricity (e), inclination (i), the 1:2 resonance angle (ϕ), the angle of ZLK mechanism (ϖ − Ω), and the angle of 𝑔 = 2s mechanism (ϖ − 2Ω). The solid lines indicate the position of 180°, and the dashed lines mark the times when the orbit switches between two mechanisms.