form_mode_manager-8.x-1.x-dev/modules/examples/form_mode_manager_examples.module

<?php

/**
 * @file
 * Contains form_mode_manager_examples.module.
 */

/**
 * Implements hook_menu_local_actions_alter().
 */
function form_mode_manager_examples_menu_local_actions_alter(&$local_actions) {
  if (isset($local_actions['form_mode_manager.action:node.contributor'])) {
    $local_actions['form_mode_manager.action:node.contributor']['appears_on'][] = 'form_mode_manager_examples.front_page';
  }
}