[X/Fe] versus [Fe/H] planes of the field stars chemically compatible with ω Cen (magenta stars). Here, the different X elements are the others provided by APOGEE DR17 but NOT used in the GMM, namely: N, O, Na, S, Ti, V, Cr, Ni, and Ce. For comparison, the APOGEE sample of field stars and the distribution of stars belonging to ω Cen are also shown as respectively contours and black circles.