Projected locations of the 1178 galaxy groups in the primary catalog in the eROSITA and Legacy Survey DR9N and DR10 13,116 deg² common footprints. The redshift confirmed by the follow-up algorithm eROMaPPer is color coded (Kluge et al. 2024), while the sizes of the detections are scaled with the angular sizes (r_500c) of the groups (see Sect. 3.3 for the r_500c estimation procedure). The inhomogeneity of the source density in this figure is due to the exposure variation across the eROSITA-DE X-ray sky (see Fig. 2 in Bulbul et al. 2024).