TOPz redshift posterior for a source with many maxima and a spectroscopic redshift of z ≈ 0.21 (ζ ≈ 0.19). The upper panel displays a 2D posterior distribution, with all templates arranged in order of increasing weighted ζ values. The colour of each point represents the photo-z likelihood of the corresponding template. The lower panel illustrates the marginalised posterior distribution for the same source. Dashed vertical lines indicate the ζ values for all peaks along with ζ_w. For details on the definitions of the three peaks and the probability-weighted ζ_w, refer to Sect. 2.4. The shaded area in the lower panel represents the range of the best peak, bounded by the minimum (${\zeta }_{\min }^{\text{best}}$) and maximum (${\zeta }_{\max }^{\text{best}}$) values.