2D transfer functions for different super-Eddington (SE) and thin disk configurations. The BH spin a = 0.8 for all configurations. The x-axis shows the time delay of the reflected photons in gravitational units, which can be converted to real units as R_g/c ≈ 4.9 s × M₆, with M₆ ≡ M_BH/10⁶ M_⊙. The energy shift is shown on the y-axis. Darker red color indicates stronger intensity I_obs. The 1D response function, Ψ(t), and the Fe Kα line profile, Ψ(E), are shown, respectively, in the bottom and left panels of each subfigure. For SE disks, we fix the inclination angle to i = 5°, and vary the optical depth of the reflection surface τ and the lamppost height h_LP between 5 and 20 R_g in (a)–(d). As a comparison, for the thin disks, we have two inclination angles: face-on (i = 5°) (e) and edge-on (i = 80°) (f).