The RBD Style Definition pane displays a Preview area, which contains a sample of the selected style based on the currently specified properties. Clicking the Edit Style button above the Preview area opens the corresponding Properties window, where you can view and modify the visual properties for the style. For more information, see Visual Properties for RBD Diagram Objects. Once you click OK in the Properties window, the Preview area is updated. For more information, see Modifying Styles in an RBD Style Library File.