photos-6.0.x-dev/config/schema/photos.views.schema.yml

views.field.photos_image_cover:
  type: views_field
  label: 'Album cover'
  mapping:
    link_photo:
      type: string
      label: 'Link this field to the album or photo.'
    view_mode:
      type: string
      label: 'The view mode to display this field.'

views.field.photos_image_set_cover:
  type: views_field
  label: 'Set as album cover link'
  mapping:
    absolute:
      type: boolean
      label: 'Absolute link.'
    output_url_as_text:
      type: boolean
      label: 'Output URL as text.'