Galaxy-galaxy lensing: cross-correlations between lens positions and source shear for different source redshift planes (ɀ_s ≃ 2 in the top panel, and ɀ_s ≃ 3 in the bottom panel, respectively) at fixed lens (deflector) redshift, ɀ_d ≃ 1. Simulation measurements (filled blue circles) are compared to linear and nonlinear theory predictions (lines). Lower panels show fractional differences between simulation and nonlinear theory.