Panel a: influence of the inner disc wind on the Hβ line profile at the bright state. The parameters of the accretion model are as follows: the corotation radius r_C = 1.5 R_∗, the mass accretion rate 10⁻⁸M_⊙ yr⁻¹, T_e(R_∗) = 8500 K, and the power index in the temperature law α = 3. The disc wind model DW1 with β = 2 (black), β = 3 (red), and β = 5 (blue). Panels b and c: influence of the inner disc wind on the Hβ line profile during eclipses. The Hβ line at the bright state (black) and the deep minimum (red) in the same wind and accretion model with β = 5 (b) and β = 2 (c). The height of the dust screen is 25 R_∗ above the disc surface.