Assign Class Pane
This pane enables you to assign documents to a class, and is displayed in the Documents window when the Assign Class option is selected from the Documents tab in the Ribbon, on the document shortcut menu, or by pressing Ctrl + H.
The classes in your project are displayed in a list, and you are able to filter that list by typing a value in the editable field at the top. For example, if you have 20 classes, and three of those classes start with the letter "G", you can type this letter into the field to display these classes only. Each additional letter typed further filters the results.
Double-click or press Enter to assign the selected class to the documents. You can remove the assigned class from a document. To do so instead of selecting a class you select no class