Getting Started

To use a custom typeface (a font that's not a standard system font) in your Developer Portal, you first need to load the custom stylesheet for the typeface using the portal.loadCSS() method.

For example, let's load the Open Sans typeface (HTTPS://FONTS.GOOGLE.COM/SPECIMEN/OPEN+SANS) from the Google Font Respository: 
// Load Open Sans
portal.loadCSS('https://fonts.googleapis.com/css?family=Open+Sans');
Then, in your CSS, add your custom typeface as the font-family. To use the same font everywhere, you can add it to the body. 
body {
    font-family: "Open Sans", sans-serif;
}
Note: When loading fonts from third-party repositories like Google Fonts, you may need to update your Developer Portal's security policies in the Admin area.