V-band image extracted from the mosaic of MUSE datacubes of NGC 6397. Overplotted are the single pointings, which have been observed multiple times at different position angles and with little offsets. Two of the planned pointings were not carried out, so the mosaic is incomplete. The colour coding indicates the number of stellar spectra that were extracted from each pointing, ranging from ~1700 in the central pointing to about 400 in the outer fields. The dashed blue line indicates the area covered by the ACS survey of Galactic globular clusters (Sarajedini et al. 2007).