Location of artificial galaxies and GCs that were added to simulated Euclid pointings, which already contained foreground stars and background galaxies. The host galaxies are represented by surface-brightness contours marking the half-light radius, μ = 23 mag arcsec⁻², and μ = 29.5 mag arcsec⁻². The artificial GCs are distributed in a grid pattern, coloured according to their magnitudes. This image is FoV1 for which the distance adopted for the added objects is 5 Mpc. The coordinates are shown in units of $0\stackrel{″}{.}1$ pixels and the colour bar is the apparent I_E magnitude of the injected GCs.