In the theme editor (Customize) => Theme Settings, click Typography
Custom font: This config will load the font assets in theme
Adding fonts to your Shopify theme
To get to the Assets folder of your theme, navigate to your Shopify dashboard. From here, go to: Online Store > Actions > Edit Code
Scroll down till you find the Assets folder and click add a new asset, select your font file and hit upload asset.
Connect font in file font-custom.liquid
Rename font in file head-css.liquid => http://prntscr.com/PGE2vdpgB5do
Enable Font-2 Body: If disabled Font-2 body, the Font body is Custom Font
Font Main: Font for Heading, If Google font is set blank Website would use the Shopify font
Font 2: Font for Body text, If Google font is set blank Website would use the Shopify font Title Slideshow: Font size, Font weight, Transform, Line height, Letter spacing
H1: Font size, Font weight, Transform, Line height, Letter spacing
H2: Font size, Font weight, Transform, Line height, Letter spacing
H3: Font size, Font weight, Transform, Line height, Letter spacing
H4: Font size, Font weight, Transform, Line height, Letter spacing
H5: Font size, Font weight, Transform, Line height, Letter spacing
H6: Font size, Font weight, Transform, Line height, Letter spacing
Font Body: Font size, Font weight, Line height
Font Title Product: Font family, Font size, Font weight, Transform, Line height, Letter spacing
Subtop ( For sub Heading): Font size, Font weight, Letter spacing