[Plugin: NextGEN Gallery] Button Back to Gallery

Hello,

where can i get a back-Button from an Single-Picture back to the Gallery-Overview?

My Problem: i have a page, there is a album on it. When i click on the album, i get the Gallery-Overview with the Thumbnails. Now i click on a Thumbnail and see the Single-Picture and under the pictures are the Buttons back, forward and the Text “Picture 3 from 5”. I need now a Button back to the Thumbnail Overview, the Gallery. I found this Code in the nggfunctions.php:


<div class="ngg-imagebrowser-nav">';
if ($back_pid) {
$backlink['pid'] = $back_pid;
$out .='<div class="back">get_permalink($backlink).'">'.'◄ '.__('Back', 'nggallery').'</div>';
}
if ($next_pid) {
$nextlink['pid'] = $next_pid;
$out .='<div class="next">get_permalink($nextlink).'">'.__('Next', 'nggallery').' ►'.'</div>';
}

What code can resolve my problem? Can anybody help me?