Same as Fig. 5 but for the Lagoon region. Wavelengths were shifted to the rest position of CH^* (top panel). Middle panel includes a UVES spectrum of the nearby star HD 156369 (low intensity, magenta dotted line) as an example of a very narrow DIB profile. HD 162780 (red dashed line) is also included, but the rest wavelength could only be estimated from the optical sodium doublet line.