Revolution Slider – Changing the font

OK, so I turn ON the Google fonts and the font already mentioned in the field doesn’t appear (PT Sans).

I’ve spoken with the developer to try and understand what’s involved in making ANY font other than Arial appear, but his instructions make no sense and I’m getting nowhere.

I’ve checked Aqua’s theme settings and you appear to include plenty of Google fonts, but if I reference any of them, they too don’t appear.

Can you/anyone please tell me what the step by step instructions are to use a different font, because there’s no instructions anywhere.

I’ve also tried the steps recommend in the link below, but again nothing happens.

http://leonpaternoster.com/2011/06/adding-google-fonts-to-your-wordpress-theme-without-touching-template-files/

Please tell my something I can do to actually access the fonts you included within the theme?