Example for the analysis of the broad interstellar band at 770 nm for source Gaia DR3 2067888218857234304. The nominal band position is indicated by dashed lines, the shaded regions indicate the range in pseudo-wavelength within which a local extremum is considered to be in agreement with the status of the band. The black curve shows the XP spectra and the red curve shows the continuum model. The black dot indicates the positions of local extrema in the second derivative.