Lensing configurations of the four 3L1S solutions: close–close, close–wide, wide–close, and wide–wide solutions. The right inset in each panel displays the magnified view around the planet host. The four empty cyan circles on the source trajectory (labeled as t₁, t₂, t₃, and t₄) denote the source positions corresponding to the deviations in the R₁, R₂, R₃, and R₄ regions. The circle size is scaled to θ_E corresponding to the total mass of the lens. The grey curves represent the equi-magnification contours.