Using SceneBuilder to Create a User Interface - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 137

Figure 3-24. The Hierarchy section of the Document Panel for FXMLLoaderExample.fxml
The Controller section displays information about the controller of the FXML file. Figure 3-25 shows the
Controller section of the Document Panel for the FXML file in the FXMLInjectionExample in Listing 3-7. You can set
the name of the controller class in this section. You can also choose to use the fx:root construct for the FXML file in
this section. You also see a list of nodes with fx:id s that are already set, and you can select the nodes by clicking on
the row in the Assigned fx:id table.
Figure 3-25. The Controller section of the Document Panel for FXMLInjectionExample.fxml