seventeen-8.x-1.3/config/schema/seventeen.schema.yml

seventeen.settings:
  type: theme_settings
  label: Seventeen settings
  mapping:
    sticky_form_actions:
      type: string
      label: Sticky form actions
    container_width:
      type: integer
      label: Container width
    font_size:
      type: integer
      label: Font size
    font_family:
      type: string
      label: Font family