Output for the T_w ≥ 1.0 mask. The first row shows T_g for the upper and lower FRs (a, b), and T_w (c) with isocontours and colour maps of their respective twist metrics. The second row shows the signed flux for the upper and lower FRs (d, e), and for the T_w region (f) with the same isocontours as the first row and colour maps of signed flux. The green dashed-circles highlight overlapping regions and the black arrow indicates a particular feature, both described in Sect. 3.1.