Maker - Advanced Settings
Maker has an advanced settings file which allows you to extend functionality of the theme beyond the Template editor. You can find this in snippets > advanced--settings.liquid
You can import custom fonts from Typekit and Google font libraries.
Both Typekit and Google fonts are case sensitive - follow the same syntax shown here: http://support.troopthemes.com/article/183-blockshop-typography
For Typekit, you will need to add your kit id between the quotation marks shown below.
Here's an example using Typekit with Minion Pro:
Here's an example with Google fonts set up with Signika Negative: