Mass Frontier allows you to save and open projection planes that have been generated with particular initial settings (transformation method and number of principal components).

To open or save spectra projection planes,

• Click on the Open Spectra Projections  or Save Spectra Projections  button in any Spectra Projector window.
  
  
• Or, choose the File | Open | Spectra Projections or the File | Save | Spectra Projections menu item.

Projection planes are saved as graphics, without the possibility of recalling the original spectra, which are displayed as points. If you need to access the spectra with structures from projection planes, you must save the references to records in Database Manager, as described in the Spectra Classifier chapter. In this case the classification must be regenerated from the original data set that was saved as references. However, it is possible to add an external spectrum.