In addition to the [default Hugo front matter parameters](https://gohugo.io/content-management/front-matter/#front-matter-variables), Congo adds a number of additional options to customise the presentation of individual articles. All the available theme front matter parameters are listed below.
Front matter parameter default values are inherited from the theme's [base configuration]({{< ref "configuration" >}}), so you only need to specify these parameters in your front matter when you want to override the default.
|`externalUrl`|string|_Not set_|If this article is published on a third-party website, the URL to this article. Providing a URL will prevent a content page being generated and any references to this article will link directly to the third-party website.|
|`editURL`|string|`article.editURL`|When `showEdit` is active, the URL for the edit link.|
|`editAppendPath`|boolean|`article.editAppendPath`|When `showEdit` is active, whether or not the path to the current article should be appended to the URL set at `editURL`.|
|`menu`|string or array|_Not set_|When a value is provided, a link to this article will appear in the named menus. Valid values are `main` or `footer`.|
|`robots`|string|_Not set_|String that indicates how robots should handle this article. If set, it will be output in the page head. Refer to [Google's docs](https://developers.google.com/search/docs/advanced/robots/robots_meta_tag#directives) for valid values.|
|`showSummary`|boolean|`list.showSummary`|Whether or not the article summary should be displayed on list pages.|
|`summary`|string|_Auto generated using `summaryLength` (see [site configuration]({{< ref "configuration#site-configuration" >}}))_|When `showSummary` is enabled, this is the Markdown string to be used as the summary for this article.|
