Possible alternative selection of the SpiteF structure. Top left: in the Z_GC vs R_GC plane (magenta large filled circles). The SpiteF stars as selected in Sect. 6.4 are identified as green triangles. The other stars in our sample are shown as blue stars. Top right: the same in the Z_max vs r_ap plane. Bottom panel: the same in the [Mg/Fe] vs [Fe/H] plane. Stars with r_ap > 7 kpc are shown as black filled squares in the top-right and bottom panels.