The most canonical way to set styles globally is to set them in the Styles section.

The basic set of styles for changing fonts are simply:

```css
body {
font-family: Crimson;
}
h1, h2, h3, h4, h5, h6 {
color:white;
text-align:center;
font-style:italic;
font-weight:bold;
}
```


1. Open a book
2. Right click

[![The book options menu][1]][1]

3. Go to the Styles section

[![Subsequent menu][2]][2]

4. Set styles
[![The Styles Page][3]][3]


  [1]: https://i.sstatic.net/64xxC.png
  [2]: https://i.sstatic.net/jqdgR.png
  [3]: https://i.sstatic.net/0ZXn3.png