Hello @gmwill92,
Thanks for asking.
Those are the font templates defined under Font Manager that can be accessed by clicking on the Settings Icon > Fonts. You can also create your own template and use the same. Baring Inherit, rest are the templates.
To learn about Inherit property, please take a look at following resource.
https://www.w3schools.com/cssref/css_inherit.asp
To access Font Manager, please take a look at following screencast.
To learn more about Font Manager, please refer following resource.
Thanks.