Radial gradients of the compact (green circles) and extended (purple diamonds). The top row shows the three absorption indices and the bottom row contains the two composite indices, which serve as proxies for total metallicity (﹩{[{\rm{MgFe}}]}^{{\prime} }﹩, bottom left) and [α/Fe] (Mg_b/〈Fe〉, bottom right). The Jupyter notebook for reproducing this figure can be found here: ✎. This repository is also available on Zenodo (https://doi.org/10.5281/zenodo.17979404).