Comparison between observed spectral line profiles with errors (solid lines) and the line-broadening profile of MUSE at each line except for He I λ 7065 (horizontal bars at FWHM and dashed lines). The normalised (pseudo-)continuum level for He I λ 6678 is fit by eye to f_min = 0.5. Hα is marginally resolved (wider than the dashed line-broadening profile), while Hβ is unresolved, and we therefore consider the measured Hβ line profile widths to be upper limits.