Example of the fit in the 2650–3050 Å range for SDSS J081025.94+410000.9 (plate-mjd-fiber: 8292-57373-0141). Panel A shows the Mg II line fitted with two Gaussians, Al II with a single Gaussian, and Fe II lines with a complex UV Fe II template, which is shown separately in panel B. Panel C shows the UV Fe II lines, which are marked with different colours for the sums of different line groups. The multiplets 62 and 63 and the additional ‘I Zw 1 lines’ in that range are coloured in green, the multiplet 61 and ‘I Zw 1 lines’ near ∼2850 Å are coloured in blue, and the multiplets 60 and 78 are coloured in red. The sums of the VBLR components of UV Fe II lines from different multiplets are shaded with the appropriate colour for each group of lines.