Selection of OBe stars with Gaia data. Hα equivalent widths of the BLOeM targets measured from Gaia low-resolution spectra. Spectroscopically classified OBe stars are marked in orange. All targets with emission exceeding 1σ are circled in red, and by-eye identifications of Hα emitters are marked with green circles. Right: fraction of spectroscopically classified OBe stars using the BLOeM dataset, versus Hα EW.