Examples of normalised spectra obtained for some program stars over two selected wavelength regions. Certain spectral features discussed in the text are marked. The spectra are ordered in steps of 0.3 (intensity scale) in the left panel and 1.0 in the right panel and with a smaller spacing between the third and fourth spectra; the double-lined spectroscopic binary BD+66° 1674 is shown at two different phases. To improve the S/N for the faint IR star, its left spectrum is a combination of many observations, Doppler-corrected for the binary motion, which smears out the DIBs.