Subtraction of the non-active, lithium-poor template (red line) from the spectrum of Stock2 r8 (black dots), which reveals the chromospheric emission in the Hα core (blue line in the bottom panel) and emphasises the Li Iλ6708 Å absorption line, removing the nearby blended lines (top panel). The green hatched areas represent the excess Hα emission (bottom panel) and Li I absorption (top panel) that were integrated to obtain and EW_Li, respectively.