Overview of three of five GCM models of TOI-1518 b considered in this work. The model in the first column is the drag-free model, while the second and last columns consider, respectively, weak (τ_drag = 10⁶s) and strong (τ_drag = 10³s) drag effects. Each panel shows the planet’s equatorial plane, with the relative size of the atmosphere inflated for visualization purposes. From top to bottom, the rows show the temperature structure; the line-of-sight velocities due to winds (at mid-transit); and the spatial distribution of Fe+, Fe, Ca+, and Ca, respectively. The white dashed contours in each plot represent isobars with pressures P = 10¹, 10⁻¹, 10⁻³, 10⁻⁵ bar.