--- /dev/null
+/**
+ * Implements hook_entity_view_alter().
+ */
+function {{ machine_name }}_entity_view_alter(&$build, $type) {
+ if ($build['#view_mode'] == 'full' && isset($build['an_additional_field'])) {
+ // Change its weight.
+ $build['an_additional_field']['#weight'] = -10;
+
+ // Add a #post_render callback to act on the rendered HTML of the entity.
+ $build['#post_render'][] = 'my_module_node_post_render';
+ }
+}