display_builder-1.0.x-dev/modules/display_builder_ui/display_builder_ui.links.action.yml

display_builder.add_form:
  route_name: 'entity.display_builder.add_form'
  title: 'Add display builder'
  appears_on:
    - entity.display_builder.collection

pattern_preset.add_form:
  route_name: 'entity.pattern_preset.add_form'
  title: 'Add preset'
  appears_on:
    - entity.pattern_preset.collection