CLASS has many functionalities to directly produce publishable quality Figures. All the GREG commands are imported in CLASS to fully annotate plots, superpose spectra with related data, stack various plots and then make hardcopy (like Post-Scripts files). A few guidelines are given here on essential GREG commands. For more details, users are advised to read the GREG manual.
Moreover, CLASS commands like DRAW and GREG implements fancy functionalities of common use when producing figures around spectra.