Colour-composite Euclid image (red: H_E, green: J_E + H_E, blue: I_E) of the galaxy cluster A2390 with the critical lines from the reference model M9 evaluated for a source at redshift z_s = 4.048 (families 3, 31, and 32) overlaid in cyan. The spectroscopically confirmed and photometric multiple images included in our analysis are also shown in magenta and yellow, respectively. Green boxes denote the predictions of the reference model. The bottom-right insert depicts a zoom-in of the area around G29.