The Compare Spectra tab in Database Manager allows you to compare two spectra. The bottom spectrum is from the active record in Spreadsheet. The middle spectrum displays the difference between the top and bottom spectrum. The top spectrum can be added from an active record by pressing the Add button or can be pasted from the Clipboard by pressing the Paste button. The peaks in the top and bottom spectrum have different colors, thus the color of a difference peak in the middle spectrum is taken from the spectrum that has a more abundant peak at a particular m/z value.

Note: After a spectrum search has been carried out, the query spectrum is automatically pasted to the top spectrum in the Compare Spectra tab to allow viewing of the peak differences of spectra in the hit list and query spectrum.