Angular power spectra of the GGL cross-correlation for the Euclid photometric sample (top panels) and percentage contributions of magnification and RSDs, (bottom panels). The contribution of magnification is the second term in Eq. (32). The contribution of RSDs, which is neglected in Eq. (32), is given by the cross-correlation RSD-κ. The top sub-figure refers to the configuration , that is, we correlate galaxies at low redshift with the background lensing. The contribution of RSDs is 3% on large scales and drops below the percent level at ℓ ≈ 30, while the contribution of magnification is at the sub-percent level on all scales. The bottom sub-figure shows the configuration , that is, we correlate number counts at high redshift with foreground lensing. The contribution of density alone and RSDs is negligible in this case: we observe the correlation of magnification with the foreground cosmic shear. The small contribution of density alone, the blue curve in the top panel, changes sign at ℓ ∼ 50: it is negative on small scales and positive on large scales.