This section covers a few topics commonly used when extending the DevOps Modeling Platform. The Customizing Menus section describes how to add custom menu actions to the application menu bar, tree elements in the project explorer, and objects on the diagram surface. The Customizing the Properties View section details how to contribute custom property sheet sections to add rich model editing capabilities to an editor. Finally, to enhance visual appearance, the Customizing Icons section shows how to contribute custom icons for use with label providers, diagram labels etc.