Position of the 11 bulge fields analyzed in the present study. The five red circles indicate the fields already examined in Rojas-Arriagada et al. (2014; Gaia-ESO survey iDR1), while the six green circles show the extra fields observed up to the iDR4. Each field is labeled according to the name coding adopted throughout the paper and based on the Galactic coordinates. The background image corresponds to an extinction map of the bulge region according to the Schlegel et al. (1998) prescription. The blue color density code saturates close to the plane where the extinction is high. A horizontal dashed gray line indicates b = −7°, used to divide the sample into fields close to and far from the plane.