Flags that affect how gtk.popover_menu.PopoverMenu widgets built from a gio.menu_model.MenuModel are created and displayed.
Submenus are presented as sliding submenus that replace the main menu.
Submenus are presented as traditional, nested popovers.
Flags that affect how gtk.popover_menu.PopoverMenu widgets built from a gio.menu_model.MenuModel are created and displayed.