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
The theme runs best if your site is installed in the root of your webserver. If your site is served from a subfolder, eg. `https://example.com/mysite/`, you have to set the following lines to your `config.toml`
````toml
baseURL = "https://example.com/mysite/"
canonifyURLs = true
````
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.
Relearn theme uses the last improvement available in hugo version 20+ to generate a json index file ready to be consumed by lunr.js javascript search engine.
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:
```toml
[outputs]
home = ["HTML", "RSS", "PRINT", "JSON"]
section = ["HTML", "RSS", "PRINT"]
page = ["HTML", "RSS", "PRINT"]
```
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.
