Results of the classifier when applied to the randomly selected set of 50 million Gaia DR3 and catWISE2020 sources using the global prior: colour-magnitude and colour-colour diagrams for the quasars. Sources from the classifier adjusted by the global prior are given by the density scale where black is zero density and yellow is high density. DSC-Combmod sources are identified by the cyan contours and the GDR3-defined pure quasar sample by the white contours. This colour code is used for all subsequent colour-magnitude and colour-colour diagrams.