Star formation rate (SFR) profiles for the example galaxies (A, B, C, and D) from Sect. 2 at z = 0 (cosmic time t = 13.8 Gyr, top panel) and at z = 1.3 (t = 4.8 Gyr, bottom panel). Colours are as for the squares in Figure 2: from brown for galaxy A (lowest stellar mass and κ_rot) to green for galaxy D (highest mass and rotational support). In the presence of a star forming inner clump, the profiles show a relatively quiescent zone between 1 kpc and 2 kpc that separate the central region with the outer gaseous disc. The latter is more extended and more star forming at higher masses, while the size of the unresolved clump evolves slightly. We indicate a galactocentric distance of r = 1 kpc, encompassing most inner star formation, with a grey, dashed vertical line.