F277W NIRCam image of the central ∼1.7″ around GN-z11 illustrating the location of the MSA shutters during the first NIRSpec-MOS observations in February 2023 (tilted boxes; boxes of the same colour are associated with the same configuration), the extraction region of the HeII clump (red square), and the HeII extended emission (yellow box). The white circle indicates the absolute uncertainty of the MSA target acquisition (hence the shutters’ footprints are uncertain by this amount). North is up, and east is to the left. The orange vertical dashed line marks the boundary beyond which fewer dithers from the NIRSpec-IFU observations are available because of the guiding problem reported in Sect. 2. We note that the full IFU FoV is larger than shown here (> 3″ × 3″ taking into account the dithers).