Left panel: Mean Lyα transmission evaluated at Δv=+200 km/s (e^−τ_EoR(Δv=+200) km/s) as a function of the position inside an ionized bubble. The observer is located toward the bottom of the figure. We computed the mean transmission by averaging over 10 000 realizations of EoR morphologies, given an assumed neutral fraction of ${\overline{x}}_{\mathrm{HI}}=0.65$ at z = 7.5 (see text for details). Right panel: Distribution of Lyα transmission at Δv=+200 km/s from these realizations, evaluated at a fixed position inside the bubble denoted by the white star (see text for details). The mean is marked by the vertical dashed line.