Top: (left to right) ERO Perseus cluster in the H_E-band (full FoV of 0.70 deg²) showing the extended emission stack, compact-sources stack, and weight map (all in inverted scale). Bottom (left to right): ERO Horsehead Nebula in the I_E-band (full FoV of 0.59 deg²) showing the extended emission stack, compact-sources stack, and weight map (all in inverted scale). All ERO fields are rotated to deliver a standard equatorial projection where north is up and east is to the left. The main difference between the two types of stacks (center versus left) is the suppression of extended emission in the compact-sources stack to optimise compact source photometry. The two flavours of stacking are motivated by the need to optimise the photometry for each class of objects (it is not recommended to use the extended-emission stacks for compact-source science). The weight maps echo the observing strategy, with a S/N that can vary greatly across the image. This is particularly striking on the bottom right, based on a standard Euclid observing sequence.