Slices of the G9 galaxy, from left to right: gas density, slices of gas density zoomed-in compared to the left hand panels, sum of CR and thermal pressures, and ratio of CR to thermal pressure, seen edge-on at 250 Myr for the different simulations as indicated in the panels (one model per row). See Fig. 3 for the other runs. The density distributions in the disc is smoother with CR injection. The sum of CR and thermal pressures in the disc increases by 1–2 orders of magnitude when adding CRs, and is either dominated by CR pressure, or equally distributed between CR and thermal pressure.