From the Processor menu select Classify…. In the Set Classification Specifications dialog
box which appears, select the √ near Image Selection under Classify to de-select it since,
during this pass, it is desired to classify only the training fields in order to obtain an initial
estimate of the quality of the class definition and training.
Note that under Write classification results to: One can also select the Disk File button
causing a disk file version of the results to be written. Since we have no need for this file in
this case, leave this button unselected.
Since the other default options are satisfactory, select OK and then Update to the "Update
Project Statistics" dialog box to begin the classification.
The classification will be complete momentarily.