The Hatch theme comes with support for all Google fonts. 

To update the default font family, size, spacing, and line-height, first follow the steps to open the Theme Settings.

Here are the next steps:

1. Open the Spacing dropdown
   
   
2. Then you'll find 2 available options:
   
   
   1. Vertical spacing: the padding-top and bottom of each section on the site
   2. Container Size: controls your site's content width