# Theme Customization
An Otter Wiki was not designed with the idea that user-defined topics might become necessary. However, since there is a need, a way to modify the theme has been added.
If you've made improvements that you'd like to share, don't forget, pull requests are always welcome. Or upon up an [issue](https://github.com/redimp/otterwiki/issues) post your code and a screenshot.
Check [otterwiki/docs/custom_css_example](https://github.com/redimp/otterwiki/tree/main/docs/custom_css_example) on github for ready-to-test examples.
## `custom.css`
With version **2.3.1** the template loads a `custom.css` and a `custom.js` which are empty by default. You can mount the directories into the container, for example with a `docker-compose.yaml` like this:
```yaml
version: '3'
services:
otterwiki:
image: redimp/otterwiki:2
restart: unless-stopped
ports:
- 8080:80
volumes:
- ./app-data:/app-data
# a custom local directory with a custom.css and a custom.js
- ./custom:/app/otterwiki/static/custom
```
## Examples
### Serif Pages
This is an example custom.css that uses the serif font
`Baskervville` for the content rendered in the page.
```css
@import url('https://fonts.googleapis.com/css2?family=Baskervville');
.content > .page {
font-family: 'Baskervville', serif;
font-weight: 400;
}
```
