media_library_media_modify-1.0.x-dev/modules/entity_reference_entity_modify/config/schema/entity_reference_entity_modify.schema.yml

field.widget.settings.entity_reference_autocomplete_with_override:
  type: field.widget.settings.entity_reference_autocomplete
  label: 'Entity reference override autocomplete display format settings'
  mapping:
    form_mode:
      type: string
      label: 'Form mode'