Projected 1σ (marked areas) and 3σ (dotted lines) confidence contours of the SED parameters for the observed systems at z = 2.3799 (upper panels), and z = 2.8266 (lower panels). The projections in each of the three possible planes are shown (Δ₁ versus Δ₂, Δ₃ versus Δ₂, and Δ₁ versus Δ₃; from left to right). The rightmost panels display the confidence regions considering the enhancement of the break at 3 Ryd, i.e. Δ₁ − Δ₂ versus the strength of the 4 Ryd break Δ₃, where the dashed lines indicate a fitted linear correlation (see text). The contours of the z = 2.8266 system are smoothed for a clearer presentation.