Example of a typical X-Shooter spectrum from our quasar sample, covering the 560–1850 nm observed range, reported in black. In pink we display the associated error. The red curve comprises the ASTROCOOK continuum and emission lines best fit, as well as the identified absorption systems. We label the main emission lines typically identified in quasar spectra. The Lyα forest and telluric-contaminated spectral regions are masked by gray-shaded regions and not fitted.