On top of [Hugo global configuration](https://gohugo.io/overview/configuration/), the Relearn theme lets you define the following parameters in your `config.toml` (here, values are default).
# If set to true, the menu in the sidebar will be displayed in a collapsible tree view. Although the functionality works with old browsers (IE11), the display of the expander icons is limited to modern browsers
# For external links you can define how they are opened in your browser; this setting will only be applied to the content area but not the shortcut menu
Without `canonifyURLs=true` URLs in sublemental pages (like `sitemap.xml`, `rss.xml`) will be generated falsly while your HTML files will still work. See https://github.com/gohugoio/hugo/issues/5226.
The theme will append an additional `index.html` to all branch bundle links by default to make the page be servable from the file system. If you don't care about the file system and only serve your page via a webserver you can also generate the links without this change by adding this to your `config.toml`
If you want to use the search feature from the file system using an older installation of the theme make sure to change your outputformat for the homepage from the now deprecated `JSON` to `SEARCH` [as seen below](#activate-search).
This will generate a search index file at the root of your public folder ready to be consumed by the Lunr search library. Note that the `SEARCH` outputformat was named `JSON` in previous releases but was implemented differently. Although `JSON` still works, it is now deprecated.
You can add a dedicated search page for your page by adding the `SEARCHPAGE` outputformat to your home page by adding the following lines in your `config.toml` file.
```toml
[outputs]
home = ["HTML", "RSS", "SEARCH", "SEARCHPAGE"]
```
You can access this page by either clicking on the magnifier glass or by typing some search term and pressing `ENTER` inside of the menu's search box .
You can activate print support to add the capability to print whole chapters or even the complete site. Just add the `PRINT` output format to your home, section and page in your `config.toml` as seen below:
This will add a little printer icon in the top bar. It will switch the page to print preview when clicked. You can then send this page to the printer by using your browser's usual print functionality.
The resulting URL will not be [configured ugly](https://gohugo.io/templates/output-formats/#configure-output-formats) in terms of [Hugo's URL handling](https://gohugo.io/content-management/urls/#ugly-urls) even if you've set `uglyURLs=true` in your `config.toml`. This is due to the fact that for one mime type only one suffix can be configured.
Nevertheless, if you're unhappy with the resulting URLs you can manually redefine `outputFormats.PRINT` in your own `config.toml` to your liking.
The MathJax configuration parameters can also be set on a specific page. In this case, the global parameter would be overwritten by the local one. See [Math]({{< relref "shortcodes/math" >}}) for additional documentation.
### Example {#math-example}
MathJax is globally disabled. By default it won't be loaded by any page.
On page "Physics" you coded some JavaScript for a dynamic formulae. You can set the MathJax parameters locally to load mathJax on this page.
You also can disable MathJax for specific pages while globally enabled.
The Mermaid configuration parameters can also be set on a specific page. In this case, the global parameter would be overwritten by the local one. See [Mermaid]({{< relref "shortcodes/mermaid" >}}) for additional documentation.
Mermaid is globally disabled. By default it won't be loaded by any page.
On page "Architecture" you coded some JavaScript to dynamically generate a class diagram. You can set the Mermaid parameters locally to load mermaid on this page.
