Go to the Design tab.
In the menu on the left, click on Text formatting.
Use the Standard Font option to apply a new font to all the text on your website.
You can also change the text colours and format for your whole site per type of text:
- All general texts
- All headers
- The footer (the section at the bottom of your website that usually contains practical info and links)
Click on Save when you're happy with your changes.