Scatter plots of magnetic inclinations, γ, versus radial distance from the spot centre in individual occurrences of PGs (green – inward-moving, top panel; red – outward-moving, middle panel) and in their surroundings (black) at τ_500nm = 1. Lines with error bars were obtained by averaging the values in 1 Mm wide sections of the radial distance. Magenta lines represent the azimuthally averaged magnetic field inclination. The vertical dashed lines mark the umbra-penumbra border typical for observed circular sunspots (0.4 r_spot). The bottom panel shows differences between the inclinations in INW and OUT PGs and their surroundings, averages, and standard deviations.