Piwigo/admin/themes/default/template/album_notification.tpl

<div class="titrePage">
  <h2><span style="letter-spacing:0">{$CATEGORIES_NAV}</span> &#8250; {'Edit album'|@translate} {$TABSHEET_TITLE}</h2>
</div>

<form action="{$F_ACTION}" method="post" id="categoryNotify">

<fieldset id="emailCatInfo">
  <legend>{'Send an information email to group members'|@translate}</legend>

{if isset($group_mail_options)}

  <p>
    <strong>{'Group'|@translate}</strong>
    <br>
    <select name="group">
      {html_options options=$group_mail_options}
    </select>
  </p>

  <p>
    <strong>{'Complementary mail content'|@translate}</strong>
    <br>
    <textarea cols="50" rows="5" name="mail_content" id="mail_content" class="description">{$MAIL_CONTENT}</textarea>
  </p>

  <p>
    <input class="submit" type="submit" value="{'Send'|@translate}" name="submitEmail">
  </p>

{elseif isset($no_group_in_gallery) and $no_group_in_gallery}
  <p>{'There is no group in this gallery.'|@translate} <a href="admin.php?page=group_list" class="externalLink">{'Group management'|@translate}</a></p>
{else}
  <p>
    {'No group is permitted to see this private album'|@translate}.
    <a href="{$permission_url}" class="externalLink">{'Permission management'|@translate}</a>
  </p>
{/if}
</fieldset>

</form>