The masthead links use a "priority plus" design pattern. Meaning, show as many navigation items that will fit horizontally with a toggle to reveal the rest.
To define these links add titles and URLs under the `main` key in `_data/navigation.yml`:
```yaml
main:
- title: "Quick-Start Guide"
url: /docs/quick-start-guide/
- title: "Posts"
url: /year-archive/
- title: "Categories"
url: /categories/
- title: "Tags"
url: /tags/
- title: "Pages"
url: /page-archive/
- title: "Collections"
url: /collection-archive/
- title: "External Link"
url: https://google.com
```
Which will give you a responsive masthead similar to this:
![priority plus masthead animation]({{ "/assets/images/mm-priority-plus-masthead.gif" | absolute_url }})
Optionally, you can add a `description` key per title in the `main` key. This `description` will show up like a tooltip, when the user hovers over the link on a desktop browser.
**ProTip:** Put the most important links first so they're always visible and not hidden behind the **menu toggle**.
{: .notice--info}
## Breadcrumbs (Beta)
Enable breadcrumb links to help visitors better navigate deep sites. Because of the fragile method of implementing them they don't always produce accurate links reliably. For best results:
1. Use a category based permalink structure e.g. `permalink: /:categories/:title/`
2. Manually create pages for each category or use a plugin like [jekyll-archives](https://github.com/jekyll/jekyll-archives) to auto-generate them. If these pages don't exist breadcrumb links to them will be broken.
Breadcrumb start link text and separator character can both be changed in `_data/ui-text.yml`.
```yaml
breadcrumb_home_label : "Home"
breadcrumb_separator : "/"
```
For breadcrumbs that resemble something like `Start > Blog > My Awesome Post` you'd apply these settings:
```yaml
breadcrumb_home_label : "Start"
breadcrumb_separator : ">"
```
## Custom Sidebar Navigation Menu
See the [**sidebars** documentation]({{ "/docs/layouts/#custom-sidebar-navigation-menu" | absolute_url }}) for information on setting up a custom navigation menu.
