An overview of the spectra in the upper tuning (258.0–261.7 GHz) of the 14 high-mass sources observed in the CoCCoA survey. The line intensity has been converted from flux in Jansky per beam to brightness temperature in Kelvin using the Rayleigh-Jean approximation. The spectra are sorted by the average line intensities from bottom to top, and each one is offset by 100 K. The shaded regions in blue and orange indicate the emission lines of MF and DME, respectively.