Lorentzian width γ_L of 3189 absorption lines in 64 different stellar atmospheres and spectra resolutions R = 5000 (top) and R = 20 000 (bottom). The color bar represents the gravity log g. The dotted light blue and solid blue lines show the polynomial γ_L for dwarf stars (T_eff = 6000 K log g = 4.2 and T_eff = 3600 K log g = 5.0, respectively). The dashed red line shows the polynomial γ_L for a giant star with T_eff = 3600 K and log g = 0.6.