Three-colour emission line image of CR7 derived from the G395H data cube. The emission line maps are obtained by integrating the continuum-subtracted data-cube around the [O III]λ5007 emission line in the velocity ranges v ≤ – 150 km s⁻¹ (blue), – 150 km s⁻¹ ≤ v ≤ 150 km s⁻¹ (green) and v ≥ 150 km s⁻¹ (red), with respect to the systemic redshift z = 6.60425 (see Sect. 3.3). The black stars mark the positions of the three main components shown in Fig. 1. White crosses mark the positions of the two brightest additional [C II]λ158μm components detected by Matthee et al. (2017a). The right panels show the normalised [O III]λ5007 line profile (black), with the best-fit multi-Gaussian fit (red) composed of the narrow (blue) and broad (green) components, extracted from circular apertures of 0.1 ″ in radius.