To customize theme typography navigate to Appearance → Customize → Typography to start customizing the theme Typography.

- Base Font
This options allows you to select a font family for you site. - Base Font Size
Customize the base font size. - Heading Lead 1
Heading to stand out used as a title on different pages. - Heading Lead 2
Heading to stand out used as a title on different pages. - H1-H6
These options allow you to customize h1-h6 heading across the site.