hugo/docs/content/en/methods/menu-entry/Menu.md

title	description	categories	keywords	action
Menu	Returns the identifier of the menu that contains the given menu entry.			related returnType signatures methods/page/IsMenuCurrent methods/page/HasMenuCurrent string MENUENTRY.Menu

{{ range .Site.Menus.main }}
  {{ .Menu }} → main
{{ end }}

Use this method with the IsMenuCurrent and HasMenuCurrent methods on a Page object to set "active" and "ancestor" classes on a rendered entry. See this example.