Number of expected PNe within each galaxy pointing (Table 1) plotted against their r-band absolute magnitude, as derived from the MUSE data covering exactly the same regions within each pointing where the presence of PNe is investigated, thus excluding masked out regions. Different symbols denote central, middle, and halo pointing, and the colour-coding indicates the FWHM value of our Moffat PSF model, as derived within each pointing through the simultaneous fit of the brightest PNe.