Top panel: the 2 keV-emission r_peak (r₉₀) as a function of μ is represented in black (gray). The green shaded area qualitatively shows the inner radii, where the bulk of X-ray emission is supposed to come from according to X-ray reverberation and micro-lensing. For increasing μ, the X-ray emission profile peaks at larger radii. Middle panel: for increasing μ the models obtain a slope of the L_X − L_UV closer to the observed one. The dark-green area represents the reference slope of the cleanest XXM-XXL (Appendix B), while the light-green refers to the slope quoted in LR17. Bottom panel: intrinsic scatter of the mock L_X − L_UV relations as a function of μ. The green area represents a tentative upper limit of the true scatter (Lusso & Risaliti 2016; Chiaraluce et al. 2018), that is only due to the physical properties of AGN. For simplicity, all panels show only the results obtained with a single f_max, corresponding to the highest r²-score (e.g., Fig. 6), and fixed α₀ = 0.02.