diff --git a/core/config/schema/core.entity.schema.yml b/core/config/schema/core.entity.schema.yml
index bf0e12d..f57194d 100644
--- a/core/config/schema/core.entity.schema.yml
+++ b/core/config/schema/core.entity.schema.yml
@@ -130,9 +130,19 @@ core.entity_form_display.*.*.*:
         type: boolean
         label: 'Component'
 
+base_field_formatter_settings:
+  type: mapping
+  mapping:
+    offset:
+      type: integer
+      label: 'Offset'
+    limit:
+      type: integer
+      label: 'Limit'
+
 # Default schema for entity display field with undefined type.
 field.formatter.settings.*:
-  type: mapping
+  type: base_field_formatter_settings
 
 # Default schema for entity form display field with undefined type.
 field.widget.settings.*:
@@ -243,7 +253,7 @@ field.widget.settings.entity_reference_autocomplete:
       label: 'Placeholder'
 
 field.formatter.settings.boolean:
-  type: mapping
+  type: base_field_formatter_settings
   mapping:
     format:
       type: string
@@ -256,7 +266,7 @@ field.formatter.settings.boolean:
       label: 'Custom output for TRUE'
 
 field.formatter.settings.string:
-  type: mapping
+  type: base_field_formatter_settings
   mapping:
     link_to_entity:
       type: boolean
@@ -270,7 +280,7 @@ field.formatter.settings.language:
       label: 'Display in native language'
 
 field.formatter.settings.number_decimal:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Number decimal display format settings'
   mapping:
     thousand_separator:
@@ -287,7 +297,7 @@ field.formatter.settings.number_decimal:
       label: 'Display prefix and suffix.'
 
 field.formatter.settings.number_integer:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Number integer display format settings'
   mapping:
     thousand_separator:
@@ -298,15 +308,15 @@ field.formatter.settings.number_integer:
       label: 'Display prefix and suffix.'
 
 field.formatter.settings.number_unformatted:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Number unformatted display format settings'
 
 field.formatter.settings.uri_link:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'URI as link display format settings'
 
 field.formatter.settings.timestamp:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Timestamp display format settings'
   mapping:
     date_format:
@@ -320,7 +330,7 @@ field.formatter.settings.timestamp:
       label: 'Time zone'
 
 field.formatter.settings.timestamp_ago:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Timestamp ago display format settings'
   mapping:
     future_format:
@@ -334,7 +344,7 @@ field.formatter.settings.timestamp_ago:
       label: 'Granularity'
 
 field.formatter.settings.entity_reference_entity_view:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Entity reference rendered entity display format settings'
   mapping:
     view_mode:
@@ -345,11 +355,11 @@ field.formatter.settings.entity_reference_entity_view:
       label: 'Show links'
 
 field.formatter.settings.entity_reference_entity_id:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Entity reference entity ID display format settings'
 
 field.formatter.settings.entity_reference_label:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Entity reference label display format settings'
   mapping:
     link:
diff --git a/core/lib/Drupal/Core/Field/FormatterBase.php b/core/lib/Drupal/Core/Field/FormatterBase.php
index db7587a..58cdd73 100644
--- a/core/lib/Drupal/Core/Field/FormatterBase.php
+++ b/core/lib/Drupal/Core/Field/FormatterBase.php
@@ -109,23 +109,88 @@ public function view(FieldItemListInterface $items, $langcode = NULL) {
   }
 
   /**
+   * Returns the cardinality setting of the field instance.
+   */
+  protected function getCardinality() {
+    if ($this->fieldDefinition instanceof \Drupal\Core\Field\FieldDefinitionInterface) {
+      return $this->fieldDefinition->getFieldStorageDefinition()->getCardinality();
+    }
+    return 0;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function defaultSettings() {
+    return array(
+      'offset' => 0,
+      'limit' => 0,
+    ) + parent::defaultSettings();
+  }
+
+  /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    return array();
+    if ($this->getCardinality() == 0) {
+      return array();
+    }
+
+    $element['offset'] = array(
+      '#type' => 'number',
+      '#title' => $this->t('Skip items'),
+      '#default_value' => $this->getSetting('offset'),
+      '#required' => TRUE,
+      '#min' => 0,
+      '#description' => $this->t('Number of items to skip from the beginning.')
+    );
+
+    $element['limit'] = array(
+      '#type' => 'number',
+      '#title' => $this->t('Display items'),
+      '#default_value' => $this->getSetting('limit'),
+      '#required' => TRUE,
+      '#min' => 0,
+      '#description' => $this->t('Number of items to display. Set to 0 to display all items.')
+    );
+
+    return $element;
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    return array();
+    $summary = array();
+    $limit =  $this->getSetting('limit');
+    $offset = $this->getSetting('offset');
+
+    if ($this->getCardinality() == 0 || (empty($limit) && empty($offset))) {
+      return $summary;
+    }
+
+    $summary[] = $this->t('Display %limit items, skip %offset items.', array(
+      '%limit' => $limit,
+      '%offset' => $offset
+    ));
+
+    return $summary;
   }
 
   /**
    * {@inheritdoc}
    */
-  public function prepareView(array $entities_items) { }
+  public function prepareView(array $entities_items) {
+    foreach ($entities_items AS $items) {
+      if ($this->getCardinality() != 0) {
+        $offset = $this->getSetting('offset');
+        $limit = $this->getSetting('limit');
+        if (!empty($offset) || !empty($limit)) {
+          $items->setValue(array_slice($items->getValue(), $offset, empty($limit) ? NULL : $limit));
+        }
+      }
+    }
+  }
 
   /**
    * Returns the array of field settings.
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php
index 60c632a..6b71f7a 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php
@@ -113,7 +113,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = [];
+    $summary = parent::settingsSummary();
     $setting = $this->getSetting('format');
 
     if ($setting == 'custom') {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
index 6f3ce02..7655eed 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
@@ -143,7 +143,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
 
     $view_modes = $this->entityDisplayRepository->getViewModeOptions($this->getFieldSetting('target_type'));
     $view_mode = $this->getSetting('view_mode');
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php
index f413227..c3a2ef7 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php
@@ -116,6 +116,8 @@ public function view(FieldItemListInterface $items, $langcode = NULL) {
    * viewed.
    */
   public function prepareView(array $entities_items) {
+    parent::prepareView($entities_items);
+
     // Collect entity IDs to load. For performance, we want to use a single
     // "multiple entity load" to load all the entities for the multiple
     // "entity reference item lists" being displayed. We thus cannot use
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
index 2084339..49d791a 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
@@ -46,7 +46,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
     $summary[] = $this->getSetting('link') ? t('Link to the referenced entity') : t('No link');
     return $summary;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
index 0e35629..8966a96 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
@@ -48,7 +48,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
 
     $summary[] = $this->numberFormat(1234.1234567890);
     if ($this->getSetting('prefix_suffix')) {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
index a1f618b..6923633 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
@@ -101,7 +101,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = [];
+    $summary = parent::settingsSummary();
     if ($this->getSetting('link_to_entity')) {
       $entity_type = $this->entityManager->getDefinition($this->fieldDefinition->getTargetEntityTypeId());
       $summary[] = $this->t('Linked to the @entity_label', ['@entity_label' => $entity_type->getLabel()]);
diff --git a/core/modules/aggregator/config/schema/aggregator.schema.yml b/core/modules/aggregator/config/schema/aggregator.schema.yml
index eb6c006..d81ea19 100644
--- a/core/modules/aggregator/config/schema/aggregator.schema.yml
+++ b/core/modules/aggregator/config/schema/aggregator.schema.yml
@@ -49,7 +49,7 @@ block.settings.aggregator_feed_block:
       label: 'Feed'
 
 field.formatter.settings.aggregator_title:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Formatter settings'
   mapping:
     display_as_link:
diff --git a/core/modules/comment/config/schema/comment.schema.yml b/core/modules/comment/config/schema/comment.schema.yml
index d9f5a77..10e4951 100644
--- a/core/modules/comment/config/schema/comment.schema.yml
+++ b/core/modules/comment/config/schema/comment.schema.yml
@@ -1,7 +1,7 @@
 # Schema for the configuration files of the Comment module.
 
 field.formatter.settings.comment_default:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Comment display format settings'
   mapping:
     pager_id:
diff --git a/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php b/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
index 80b1af4..3969d05 100644
--- a/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
+++ b/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
@@ -231,13 +231,16 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
+    $summary = parent::settingsSummary();
+
     // Only show a summary if we're using a non-standard pager id.
     if ($this->getSetting('pager_id')) {
-      return array($this->t('Pager ID: @id', array(
+      $summary[] = $this->t('Pager ID: @id', array(
         '@id' => $this->getSetting('pager_id'),
-      )));
+      ));
     }
-    return array();
+
+    return $summary;
   }
 
 }
diff --git a/core/modules/datetime/config/schema/datetime.schema.yml b/core/modules/datetime/config/schema/datetime.schema.yml
index 406a2fd..1e350eb 100644
--- a/core/modules/datetime/config/schema/datetime.schema.yml
+++ b/core/modules/datetime/config/schema/datetime.schema.yml
@@ -24,7 +24,7 @@ field.value.datetime:
       label: 'Default date value'
 
 field.formatter.settings.datetime_base:
-  type: mapping
+  type: base_field_formatter_settings
   mapping:
     timezone_override:
       type: string
@@ -53,7 +53,7 @@ field.formatter.settings.datetime_custom:
       translation context: 'PHP date format'
 
 field.formatter.settings.datetime_time_ago:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Datetime time ago display format settings'
   mapping:
     future_format:
diff --git a/core/modules/field/tests/modules/field_test/config/schema/field_test.schema.yml b/core/modules/field/tests/modules/field_test/config/schema/field_test.schema.yml
index 3712b47..6db75ce 100644
--- a/core/modules/field/tests/modules/field_test/config/schema/field_test.schema.yml
+++ b/core/modules/field/tests/modules/field_test/config/schema/field_test.schema.yml
@@ -1,5 +1,5 @@
 field.formatter.settings.field_test_default:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Field test default display format settings'
   mapping:
     test_formatter_setting:
@@ -7,7 +7,7 @@ field.formatter.settings.field_test_default:
       label: 'Test setting'
 
 field.formatter.settings.field_test_multiple:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Multiple field test display format settings'
   mapping:
     test_formatter_setting_multiple:
@@ -18,7 +18,7 @@ field.formatter.settings.field_test_multiple:
       label: 'Test altering'
 
 field.formatter.settings.field_empty_setting:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Empty setting field display format settings'
   mapping:
     field_empty_setting:
@@ -26,7 +26,7 @@ field.formatter.settings.field_empty_setting:
       label: 'Test setting'
 
 field.formatter.settings.field_test_with_prepare_view:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Field prepare step display format settings'
   mapping:
     test_formatter_setting_additional:
diff --git a/core/modules/file/config/schema/file.schema.yml b/core/modules/file/config/schema/file.schema.yml
index b9f8918..0346432 100644
--- a/core/modules/file/config/schema/file.schema.yml
+++ b/core/modules/file/config/schema/file.schema.yml
@@ -68,19 +68,19 @@ field.field_settings.file:
       label: 'Enable Description field'
 
 field.formatter.settings.file_default:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Generic file format settings'
 
 field.formatter.settings.file_rss_enclosure:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'RSS enclosure format settings'
 
 field.formatter.settings.file_table:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Table of files format settings'
 
 field.formatter.settings.file_url_plain:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'URL to file format settings'
 
 field.widget.settings.file_generic:
diff --git a/core/modules/image/config/schema/image.schema.yml b/core/modules/image/config/schema/image.schema.yml
index 323220b..f5ff51b 100644
--- a/core/modules/image/config/schema/image.schema.yml
+++ b/core/modules/image/config/schema/image.schema.yml
@@ -129,7 +129,7 @@ field.value.image:
   label: 'Default value'
 
 field.formatter.settings.image:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Image field display format settings'
   mapping:
     image_link:
diff --git a/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php b/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php
index 4c3a27d..5c0d593 100644
--- a/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php
+++ b/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php
@@ -125,14 +125,14 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
       '#options' => $link_types,
     );
 
-    return $element;
+    return parent::settingsForm($form, $form_state) + $element;
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
 
     $image_styles = image_style_options(FALSE);
     // Unset possible 'No defined styles' option.
diff --git a/core/modules/link/config/schema/link.schema.yml b/core/modules/link/config/schema/link.schema.yml
index fd2edb1..8c92f02 100644
--- a/core/modules/link/config/schema/link.schema.yml
+++ b/core/modules/link/config/schema/link.schema.yml
@@ -1,7 +1,7 @@
 # Schema for the configuration files of the Link module.
 
 field.formatter.settings.link:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Link format settings'
   mapping:
     trim_length:
diff --git a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
index 7d2d0ee..6c83417 100644
--- a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
+++ b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
@@ -138,7 +138,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
 
     $settings = $this->getSettings();
 
diff --git a/core/modules/options/config/schema/options.schema.yml b/core/modules/options/config/schema/options.schema.yml
index 017b396..8ebbf94 100644
--- a/core/modules/options/config/schema/options.schema.yml
+++ b/core/modules/options/config/schema/options.schema.yml
@@ -100,11 +100,11 @@ field.value.list_string:
       label: 'Value'
 
 field.formatter.settings.list_default:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Options list default display settings'
 
 field.formatter.settings.list_key:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Key format settings'
 
 field.widget.settings.options_buttons:
diff --git a/core/modules/responsive_image/config/schema/responsive_image.schema.yml b/core/modules/responsive_image/config/schema/responsive_image.schema.yml
index f05a8e2..1b26a09 100644
--- a/core/modules/responsive_image/config/schema/responsive_image.schema.yml
+++ b/core/modules/responsive_image/config/schema/responsive_image.schema.yml
@@ -58,7 +58,7 @@ responsive_image.image_mapping_type.sizes:
         label: 'Image style'
 
 field.formatter.settings.responsive_image:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Responsive image list format settings'
   mapping:
     responsive_image_style:
diff --git a/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php b/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
index ff91e68..4d068d0 100644
--- a/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
+++ b/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
@@ -163,7 +163,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
 
     $responsive_image_style = $this->responsiveImageStyleStorage->load($this->getSetting('responsive_image_style'));
     if ($responsive_image_style) {
diff --git a/core/modules/responsive_image/tests/modules/responsive_image_test_module/config/schema/responsive_image_test_module.schema.yml b/core/modules/responsive_image/tests/modules/responsive_image_test_module/config/schema/responsive_image_test_module.schema.yml
index 6208012..a2001b0 100644
--- a/core/modules/responsive_image/tests/modules/responsive_image_test_module/config/schema/responsive_image_test_module.schema.yml
+++ b/core/modules/responsive_image/tests/modules/responsive_image_test_module/config/schema/responsive_image_test_module.schema.yml
@@ -1,6 +1,6 @@
 # Schema for the configuration files of the Responsive image test theme module.
 field.formatter.settings.responsive_image_test:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Responsive image list format settings'
   mapping:
     responsive_image_style:
diff --git a/core/modules/taxonomy/config/schema/taxonomy.schema.yml b/core/modules/taxonomy/config/schema/taxonomy.schema.yml
index efa08e1..c1a933d 100644
--- a/core/modules/taxonomy/config/schema/taxonomy.schema.yml
+++ b/core/modules/taxonomy/config/schema/taxonomy.schema.yml
@@ -35,5 +35,5 @@ taxonomy.vocabulary.*:
       label: 'Weight'
 
 field.formatter.settings.entity_reference_rss_category:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Taxonomy format settings'
diff --git a/core/modules/telephone/config/schema/telephone.schema.yml b/core/modules/telephone/config/schema/telephone.schema.yml
index dc8713a..49eaa7d 100644
--- a/core/modules/telephone/config/schema/telephone.schema.yml
+++ b/core/modules/telephone/config/schema/telephone.schema.yml
@@ -1,7 +1,7 @@
 # Schema for the configuration files of the Telephone module.
 
 field.formatter.settings.telephone_link:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Telephone link format settings'
   mapping:
     title:
diff --git a/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php b/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
index f77b751..fd2efd9 100644
--- a/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
+++ b/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
@@ -46,7 +46,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
     $settings = $this->getSettings();
 
     if (!empty($settings['title'])) {
diff --git a/core/modules/text/config/schema/text.schema.yml b/core/modules/text/config/schema/text.schema.yml
index dfc92cd..c09b3b2 100644
--- a/core/modules/text/config/schema/text.schema.yml
+++ b/core/modules/text/config/schema/text.schema.yml
@@ -77,11 +77,11 @@ field.value.text_with_summary:
       label: 'Text format'
 
 field.formatter.settings.text_default:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Formatted text default display format settings'
 
 field.formatter.settings.text_summary_or_trimmed:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Summary or trimmed formatted text display format settings'
   mapping:
     trim_length:
@@ -89,7 +89,7 @@ field.formatter.settings.text_summary_or_trimmed:
       label: 'Trim length'
 
 field.formatter.settings.text_trimmed:
-  type: mapping
+  type: base_field_formatter_settings
   label: 'Trimmed text display format settings'
   mapping:
     trim_length:
diff --git a/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
index 1842a43..83f861a 100644
--- a/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
+++ b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
@@ -58,7 +58,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = parent::settingsSummary();
     $summary[] = t('Trimmed limit: @trim_length characters', array('@trim_length' => $this->getSetting('trim_length')));
     return $summary;
   }
diff --git a/core/modules/user/config/schema/user.schema.yml b/core/modules/user/config/schema/user.schema.yml
index 627d8a6..6a16d8c 100644
--- a/core/modules/user/config/schema/user.schema.yml
+++ b/core/modules/user/config/schema/user.schema.yml
@@ -187,7 +187,7 @@ entity_reference_selection.default:user:
       label: 'Include the anonymous user in the matched entities.'
 
 field.formatter.settings.user_name:
-  type: mapping
+  type: base_field_formatter_settings
   mapping:
     link_to_entity:
       type: boolean