Menu views appear as part of a window or dialog via its ~menu_bar argument as a MenuBar, which contains Menus that can have menu items and other menus. Menu views can also appear through a PopupMenu that is rendered via WindowChildView.popup.
3.4.1 Menu View Interface
3.4.2 MenuBar
3.4.3 Menu
3.4.4 PopupMenu
3.4.5 MenuItem
3.4.6 CheckableMenuItem
3.4.7 MenuItemseparator