Comparison between model predictions and NSD data from Ryde et al. (2025, red points). Each panel shows the evolution of [Mg/Fe], [Si/Fe], and [Ca/Fe] as a function of [Fe/H], as predicted by the four chemical-evolution models considered in this work (PRIM, ENR_D10, ENR_D05, and ENR_D03; see Table 1 for the adopted parameters). Shaded regions around the model curves indicate the uncertainties obtained by Gaussian smoothing with σ_[Fe/H] = 0.2 dex (this is consistent with the MDF fitting procedure) and σ_[X/Fe] = 0.1 dex, where X denotes the considered element. Typical uncertainties of the Ryde et al. (2025) data are indicated in the lower left corner of each panel by a red cross.