Example of a quality A (confidence 3) object (MUSE-Wide ID 108025145 at z = 0.74, strongest line in S/N is O ii). Multiple emission lines from this galaxy are detected above the detection threshold S/N_thresh = 8. First row: individual layers from the S/N cube after matched filtering with LSDCat. The position of the layers is chosen to match the classified redshift of the object. Second row: pseudo narrow-band images created by integration over 5 Å around the expected position of the emission lines in the continuum subtracted datacube. Third row: corresponding segments of the spaxel from the LSDCat generated S/N cube with the highest S/N peak. The dotted line indicates the detection threshold S/N_thresh = 8. Fourth row: corresponding segments of an aperture extracted spectrum (aperture radius = 0.7′′ = 3.5 spectral pixels) from the flux datacube. The grey line shows our empirically determined noise estimate.