JWST NIRSpec/PRISM 1D and 2D spectra of GN-z9p4 at z = 9.38 (top). The low-resolution spectrum is shown in black, and the 1σ uncertainty in red. Vertical dashed lines (green) mark the position of detected or un-detected nebular emission lines. X-axis at the bottom and top refer to the observed and rest-frame wavelengths in μm, respectively. Bottom panel shows “postage stamps” of a total size of 1″ × 1″ (corresponding 4.4 kpc × 4.4 kpc physical size at z = 9.38) of GN-z9p4 between 1.8 and 4.4 μm.