Hertzsprung-Russel diagram for our control sample of PEPSI stars based on Gaia DR2 data and colored for surface gravity (based on MIST fits). The HARPS MS/post-MS sample from Paper I and this work is included as reference (gray markers). Three PEPSI stars are not shown due to missing Gaia parallaxes. The marker shapes correspond to the evolutionary phases according to MIST: main sequence (circle), sub-or red giant (triangle), core Helium burning (squares), asymptotic giant (diamonds), extended asymptotic giant (stars), and thermally pulsing asymptotic giant (crosses).