editor-field.php

<?php
// AnsPress upload field.
array(
  ...
  'type' => 'editor',
  'editor_args' => array(
    // Pass tinyMce options.
  ),
  'upload_options' => array(
    // Pass upload field options.
    'multiple' => true,
    'max_files' => 10,
   ),
  ...
);