You can upload custom web fonts (.woff, etc.) to the Oxygen using the Elegant Custom Fonts plugin or 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.
To add a font using Elegant Custom Fonts, follow these steps:
Once the plugin is installed and activated, click Manage Fonts
Click Add Font Family, type font family name, then click Add Font Family
Click add @font-face, then choose font-weight and font-style.
Specify .woff URL, then click Add Font Face.
The added font now automatically appears in all Oxygen's Font Family lists.