HST/WFPC2 optical image of NGC 2110 obtained with the F791W filter, shown on a linear scale (gray colors and blue contours). The orange contours (also on a linear scale) are the VLA radio 6 cm emission from Ulvestad & Wilson (1983). We also mark with a red rectangle the approximate size of the GTC/MEGARA FoV of 12.5″ × 11.3″. The dashed and dotted lines are the PA of the galaxy major axis (PA ≃ 163° measured from the north to the east; see Ferruit et al. 2004) and the minor axis, respectively. The dashed-dotted line is the PA of the slit used by González Delgado et al. (2002) and discussed in Sect. 3.3.