Is it possible to change the font to an option not available within the dropdown list? We would like to add a font called "Proxima Nova" if possible.

Changing the drop down is not currently supported.

But, if your font is supported by all common browsers; or if you already downloaded this font to the end user's browser, you can simply switch to source view in the Guided Learning editor and change it. like so:

<p style="font-family: "Times New Roman", Times, serif;">text in Times New Roman</p>

Text is in Times New Roman.

If you want to globally change the font of all text in your guides download our design kit from the theme page.