Entity Delta Formatter

The Entity Delta Formatter module provides a field formatter for entity
reference fields that displays a selected set of items from a field with
multiple items.

Install

• Install as you would normally install a contributed Drupal module. Visit:
  https://www.drupal.org/docs/8/extending-drupal-8/installing-drupal-8-mod...
  for further information.

Usage

• Set the field formatter for an entity reference field to
  "Rendered entities by delta".
• In the configuration menu, specify deltas.
  • Select an item by entering its position in the list starting with 1.
  • Select an item from the end of the list by entering its position from the
    end as a negative number. E.g. "-2" to get the second to last item.
  • Select ranges of items by specifying the inclusive start and end separated
    by "_". E.g. "1_3" to get the first, second and third items or "2_-1" to get
    all items but the first.
  • Multiple selections may be combined using commas. E.g "1_3, -1" to get the
    first, second, third, and last items.