Top panel: zoom of the J0022 2D spectrum around the Hα line; the shaded white area shows the region associated with bad skyline subtraction residuals. Lower panels: J0022 non-parametric velocity measurements as a function of the position along the spatial axis from which 1D spectra have been extracted. Red symbols refer to [N II] line velocity measurements. In the first panel, V90 (positive) and V10 (negative) measurements are reported. The other panels show W80, V50, and Vpeak variations. See Fig. 6 for a more detailed description of the figure.