Seventeen ERO fields (approximately 0.6 deg² each, I_E preview). The blue frame encompasses the entirety of the FITS image for each science stack, guaranteeing that no quality Euclid data are omitted during projection into the equatorial coordinate system. Pixels identified as valid are those shared by both the VIS and NISP instruments. A dithering pattern impacted three fields – Taurus, NGC 6254, and IC 10 – resulting in incomplete sky coverage. The Fornax field is limited by having only two VIS exposures, leading to prominent gaps. Holmberg II, Fornax, and Dorado suffer from issues related to stray light, which will be addressed in the upcoming ERO data release. Any observed variations in the background of the remaining images stem from the LSB detection of Galactic nebulae (top row) or the presence of faint Galactic cirrus, illustrating the Euclid’s capability to easily capture these subtle astronomical features.