3D–1D abundance corrections as computed for individual OH UV lines: Δ_3D−1D (top panels), Δ_{3D− ⟨ 3D ⟩} (middle panels), and Δ_{⟨ 3D ⟩ −1D} (bottom panels) plotted versus the line excitation potential, χ (left), and line equivalent width, W (right). Red dots indicate all OH UV lines in our sample, half-filled black circles represent lines whose contribution functions are shown in Fig. 6 (see text for details). Δ_{⟨ 3D ⟩ −1D} values are provided in Appendix A.