Number of identified lines (size of the points) and average purity (colour-coded) for the even-Z elements C, O, Mg, and Si, at different combinations of T_eff, log g, and [Fe/H], for the different WEAVE HR set-ups. To guide the eye, black circles proportional to the identification of five lines are also plotted for each combination of T_eff-log g (noting that the relative size of the black circles and, hence, of the coloured points change from one frame to the other, for visualisation purposes). The absence of coloured points implies the non-detection of lines. A minimum purity threshold of 0.5 has been set. The average () and maximum (max, reported only if different than ) number of identified lines across the selected models are also indicated within each frame.