Rest-frame UV emission lines in the G140M spectrum of GS-z9-0. In particular, we show a zoomed-in image of the region of the G140M spectrum around the N IV] doublet (left), C IV doublet (middle), He II, and O III] emission (right). The C IVλ1548, 51 doublet is resolved, but only the redder line is detected at >4σ significance. The C IV complex is blueshifted by ∼117 km s⁻¹ compared to the systemic redshift, whereas no velocity offset is seen for O III] λ1666 and He II λ1640. The N IV] λ1483 line is tentatively detected at ∼3.4σ only in the 3 pixel extracted spectrum, whereas no significant N IV] λ1486 emission is found.