If you'd like to add custom fonts, or load Google Fonts locally, we highly recommend using the following community-created solution: https://www.altmann.de/en/blog-en/code-snippet-custom-fonts.
Alternatively, you may also upload custom web fonts (.woff, etc.) to Oxygen using the Use Any Font plugin.
To add a font using Use Any Font, follow these steps:
Click Use Any Font in the WordPress admin menu
Click "Generate Free Lite / Test API Key" and then click "Verify" (or add your API key if you have one)
Go to the "Upload Font" tab and click "Add Fonts" on the right hand side
Give the font a name, select the font file from your computer and click "Upload"
The added font now automatically appears in all Oxygen's Font Family lists.
