Excerpts from an NSO spectral atlas (black lines; Kurucz et al. 1984), spatially averaged synthetic spectra (red lines; see text for details), and instrumental filter profiles (green lines referring to the scale on the right side of the figure) for the part of the OH band around 3118 Å (top panel), the CN band at 3877 Å (middle panel), and the Fe i line at 5250.2 Å (bottom panel). The dotted red line in the bottom panel simulates the Doppler shifted profile of the Fe i line at 5250.2 Å produced by an upflow of 5 km s^-1. The red arrows indicate the five scan positions of the IMaX V5-6 mode, while the twelve blue arrows mark them for the L12-2 mode.