The documentation side menu, the documentation page browser etc. are listed using Hugo's default sort order, which sorts by weight (from 1), date (newest first), and finally by the link title.
**Note:** For page weights, it can be smart not to use 1, 2, 3 ..., but some other interval, say 10, 20, 30... This allows you to insert pages where you want later.
The `Documentation` main menu is built from the sections below `docs/` with the `main_menu` flag set in front matter of the `_index.md` section content file:
```yaml
main_menu: true
```
Note that the link title is fetched from the page's `linkTitle`, so if you want it to be something different than the title, change it in the content file:
**Note:** The above needs to be done per language. If you don't see your section in the menu, it is probably because it is not identified as a section by Hugo. Create a `_index.md` content file in the section folder.
When you navigate to a section that has content, the specific section or page (e.g. `_index.md`) is shown. Else, the first page inside that section is shown.
The site links in the top-right menu -- and also in the footer -- are built by page-lookups. This is to make sure that the page actually exists. So, if the `case-studies` section does not exist in a site (language), it will not be linked to.
One example is [Custom Hugo Shortcodes](/docs/contribute/style/hugo-shortcodes/). It is considered a `leaf bundle`. Everything below the directory, including the `index.md`, will be part of the bundle. This also includes page-relative links, images that can be processed etc.:
Another widely used example is the `includes` bundle. It sets `headless: true` in front matter, which means that it does not get its own URL. It is only used in other pages.
* For translated bundles, any missing non-content files will be inherited from languages above. This avoids duplication.
* All the files in a bundle are what Hugo calls `Resources` and you can provide metadata per language, such as parameters and title, even if it does not supports front matter (YAML files etc.). See [Page Resources Metadata](https://gohugo.io/content-management/page-resources/#page-resources-metadata).
The `SASS` source of the stylesheets for this site is stored below `src/sass` and can be built with `make sass` (note that Hugo will get `SASS` support soon, see https://github.com/gohugoio/hugo/issues/4243).