Coverage of a single slew by VIS. The default dither pattern in Euclid is “S”-shaped (shown as the black lines in the bottom left corner) with displacements (Δx,Δy) = (0,0; 50,100; 0,100; 50,100)″. The weights show the number of times an area has been observed. In each field of view there are 6 × 6 non-square CCDs that have asymmetric spacing between them in the vertical and horizontal directions, which results in a non-square field of view.