Screenshot of MetaboMiner's "Annotation View". The contents of the reference spectral library and the automatically identified compound list are shown on the left panel. The spectral image is displayed on the right panel. The red peaks correspond to the reference spectra of the current compound being annotated (Valine). Peak searching is carried out by right clicking on a corresponding Valine peak. The user can also directly edit the current compound by inserting, removing, or dragging its peaks to match the exact pattern of the reference spectrum.