slides_presentation-8.x-1.x-dev/slides_presentation.links.action.yml

entity.slides_presentation.add_form:
  route_name: entity.slides_presentation.add_form
  title: 'Add Presentation'
  appears_on:
    - entity.slides_presentation.collection

entity.slides_slide.add_form:
  route_name: entity.slides_slide.add_form
  title: 'Add Slide'
  appears_on:
    - entity.slides_slide.collection
    - entity.slides_presentation.collection