Contribution of different processes to the transmission spectra of HAT-P-18 b (top), WASP-39 b (middle), and WASP-96 b (bottom) obtained from the FRECKLL retrievals. The contribution from water dominates most of the spectra after 1.2 μm, while short wavelengths are dominated by the broadened lines of Na and K (WASP-96 b), or by aerosols (HAT-P-18 b and WASP-39 b). In HAT-P-18 b, H₂O, CH₄, CO₂ and Na are detected. In WASP-39 b, H₂O, CO, CO₂, Na, and K are detected. In WASP-96 b, H₂O, CO, Na, and K are detected.