All presenter components with built-in context menus have a ContextMenuStrip and a ShowDefaultContextMenu property. This property can be used for extending the built-in context menus with your own context menu items:
1.Set the ShowDefaultContextMenu of the presenter component to true.
2.Create a ContextMenuStrip component by dragging it from the IDE's tool box onto your form.
ContextMenu's are for backwards compatibility with .NET Framework 1.x only and are therefore not supported by NShape.
3.Create all context menu items that should extend the presenter component (e.g. a Display) as sub items of the ContextMenuStrip created in 1.
4.Assign the ContextMenuStrip created in 1 to the presenter component (e.g. a Display) and your items will show on top of the presenter component's context menu:
Built-in context menu extended with a custom menu item.