Binned mixing matrices as band-pass filters and the physical scales mixed for each redshift tomographic bin edge. Top: redshift as a function of multipole for different wave-numbers. The coloured horizontal dashed-lines are the centre of the redshift tomographic bins used in the analysis and shown in Fig. 1; the black lines are curves of constant wavenumber, k = ℓ/χ(z), in units of h Mpc⁻¹ for a given ℓ and z, where χ(z) is the co-moving distance. Bottom: the KiDS-1000 pseudo-C_ℓs binned mixing matrices (see Fig. 2, for example). These are convolved with the theory C_ℓs (see Eq. (23)) to model the effect of multipole mixing introduced by the survey mask. The filters are calculated using all the multipoles inside the eight log-spaced bandwidths from 76 ≤ ℓ ≤ 1500.