KiDS-1000 full mixing matrix, M_ℓℓ′ from Eqs. (14) and (15), for the third redshift tomographic bin. For this case, W⁺⁺ in the diagonal is responsible for most of the mixing for the E-modes. In a scenario with non-zero but small B-modes, the off-diagonal terms are still subdominant to the E-mode signal. For each individual block, W⁺⁺ and W⁻⁻, we show the matrices calculated in the range 2 ≤ ℓ ≤ 3070. From Eqs. (16) and (17) one can see that these objects are not symmetric in ℓ-ℓ′.