This section helps you configure Heading & Subheading for all the sections that have the Heading and Subheading options from HEADING OPTIONS in the theme as Featured Collection, Blog Post, Collection List...
Step: From Sections Sidebar > Section Heading
In this section, there are 2 blocks: Heading and Subheading. You can config Color, Font-family, Font-size, Font-weight, Line height, Letter spacing, and Bottom space for these blocks.
You also can config options on different devices: Desktop, Tablet and Mobile.
'Font-family' option takes from Theme settings > TYPOGRAPHY. Refer to this document.