2D absorption line profiles of CaII K (left) and H (middle), and the best-fit model (right) for two example galaxies. The red points (lines) show the best-fit velocity (velocity dispersion) profile from PPXF that was used as input for our forward modelling in Section 3.3. We note that the PPXF fits were obtained from the entire wavelength range of the spectra, and the two absorption lines illustrated in this figure serve as an example.