Distribution of normalised surface brightness profiles for different types of galaxies. The subplots show the profiles for Type II (top left), Type III (top right), Type I (bottom left), and the combined median profiles for the three types around R = R_norm (bottom right). Individual profiles are displayed with a colour gradient, while the median profile is represented in black. The shaded region around the median indicates the 68% confidence interval, reflecting the variability among individual profiles. Note that R_norm corresponds to R₂₅ for Type I or R_break for Type II and III.