Deleting PDF files To delete a PDF file, you mustGo to the "Documents" menu item and click "List of unclassified". On the file you want to delete, click the "Delete" buttonThen confirm the action by clicking the "OK" button It is also possible to delete a file from the preview mode. Go to the viewing mode by clicking the "Classify" button. You can use the "Next" and "Previous" buttons to move from file to file.On the file you want to delete, click the "Delete" button. Then confirm the action by clicking the "OK" button