There is a separate section in the Hanapanel, dedicated for theme font management. The Fonts section provides several options to apply different custom fonts for the different parts of the theme – there is no limit about the fonts you can use!
You can enable Cufon font replacement for the theme – you can either use one of the default fonts the theme provides or upload your own:
You can also use the fonts that the Google Fonts API provides – just insert its link to enable it for the theme:
You can also set font family and size to everything of the theme.