The input fields used to update the typography. Refer to the [typography tutorial](https://shopify.dev/docs/apps/checkout/styling/customize-typography)
for more information on how to set these fields.
Access Scopes
Fields
primary:
CheckoutBrandingFontGroupInput -
A font group used for most components such as text, buttons and form controls.
secondary:
CheckoutBrandingFontGroupInput -
A font group used for heading components by default.
size:
CheckoutBrandingFontSizeInput -
The font size.