Predicted KiDS-1000 constraints (reference setup, IDs 1 and 7) on the key cosmological parameters Ω_m and S₈ in relation to previous KiDS results (Wright et al. 2020a; Tröster et al. 2020a) and the Planck Collaboration VI (2020) primary CMB constraints, as indicated in the legends. Left panel: results for cosmic shear only; right panel: those for the joint analysis of BOSS clustering, galaxy-galaxy lensing between BOSS/2dFLenS and KiDS-1000, and cosmic shear. The star in each panel marks the fiducial cosmology assumed for the forecast. Axis scales differ between the two panels.