Distribution of A_x, A_y, and A_z as a function of distance from the SMC center (R_3D). Anisotropy was estimated for each of the models studied in Piatti (2026). Top: cluster disk model (Piatti 2021a). Middle: old disk model (age >2 Gyr). Bottom: young disk model (age < 50 Myr). Star clusters pertaining to different substructures (Dias et al. 2016) are drawn in different colors, as indicated in the top-right panel. The red line (A_i = 0.33, i = x, y, z) represents the expected value for an isotropic motion. The symbol sizes are proportional to N^eff.