[X/Fe] vs [Fe/H] for n-capture elements in the SMC. Abundance patterns are shown for Eu (left-most panel), Zr (second left-most) and Ba (second right-most) and La (right-most). Solid lines show the genuine chemical evolution tracks for the reference models adopting Rubele et al. (2018) SFH (blue) and Massana et al. (2022) SFH (green). The shaded cyan and light-green regions are associated model predictions account for observational uncertainties (i.e. synthetic models). Data come from Anoardo et al. (2026, Eu) and Mucciarelli et al. (2023a, Zr, Ba, La) for SMC field stars (orange dots) and Mucciarelli et al. (2023b) for SMC GCs (black dots). The orange contour lines represent density lines of the observed stellar distributions in SMC field stars.