Overview of the z ∼ 3 quasar samples with MUSE observations. The histograms of the absolute i-band magnitude (normalized at z = 2, following Ross et al. 2013) of the QSO MUSEUM III survey: 59 faint quasars from this study (orange), and 61 bright quasars from QSO MUSEUM I (dark green). For comparison, we show the 19 bright quasars from Borisova et al. (2016) (light green) and the 12 faint quasars from Mackenzie et al. (2021) (yellow). The median redshift of each sample is indicated in the legend.