3C 088: FR II/LEG, 1″ = 0.60 kpc. Top left: radio contours (black) overlaid onto the MUSE continuum. The size of the image is the whole MUSE field of view, 1′ × 1′. Top center: MUSE continuum image with superposed the region in which we explored the emission line properties (white square). Top right: [N II] emission line image extracted from the white square in the center panel. Surface brightness is 10⁻¹⁸ erg s⁻¹ cm⁻² arcsec⁻². Central panels: (left) velocity field (in km s⁻¹) from the [N II] line; (right) position–velocity diagram extracted from the synthetic aperture shown in the left panel (width 06, PA = 90°). Bottom panels (left): velocity dispersion distribution and (right) [N II]/Hα map.