Left panels: spectral subtraction example from V1216 Sgr (J18498−238), an M3.5 dwarf, performed with the VIS channel data of CARMENES spectrum, as provided in DR1 (I. Ribas et al. 2023), showing He I D₃, Na I D₁, D₂ (top), Hα (middle), and Ca II IRT-a λ8498 (bottom). Right panels: spectral subtraction example from YZ Cet (J01125−169), an M4.5 dwarf, performed with the VIS channel of a CARMENES spectrum as provided in DR1, showing also He I D₃, Na I D₁, D₂ (top), Hα (middle), and Ca II IRT-a λ8498 (bottom). Lines and color codes are as in Figure 5.