A Spectra Projector window cannot be directly opened from the program desktop. It must be generated from the Spectra Classifier module, by selecting Principal Component Analysis or Fuzzy Clustering option and clicking the Classify Now button. You cannot alter classification results once they have been generated. If you want to remove a spectrum (point) from a projection plane, you must remove this spectrum from the input data, and then launch a new classification process. An unlimited number of Spectra Projector windows can be opened at any given time in the program.