drupal/core/modules/search/css/search.admin.css

/**
 * @file
 * Styles for administration pages.
 */

/**
 * Add search page select/submit.
 */
#search-admin-settings #edit-add-page {
  margin-bottom: 1em;
}
#search-admin-settings #edit-add-page label {
  display: block;
}