On the Data Discovery menu, select Setup > Classifiers. The Classifiers screen appears.
Click the Classify Now button. The Classify Now pane appears.
Ensure Custom text is enabled.
Click the Use saved test data option. If you have saved previous test data, the provided name will be available for selection. Upon selection, the given test data will populate in the Test Data field and the used Classification Profile will be applied.
Click the Classify button. Upon receiving Status: Success, the Classification tab will populate the applied classifiers labels against the test data.