Yes, i set them to 120x80 px after installation.
this is the link from the page
<div class="gallery">
<a href="/joomla/images/com_edocman/galleries/Queen_Elizabeth_01.png#joomlaImage://local-images/com_edocman/galleries/Queen_Elizabeth_01.png?width=1920&height=1080" data-caption="">
<img src="/joomla/images/com_edocman/galleries/Queen_Elizabeth_01.png#joomlaImage://local-images/com_edocman/galleries//thumbs/Queen_Elizabeth_01.png?width=1920&height=1080" alt="">
</a>
where does the thumbnail gallery image get the height from? There is no thumb folder and i cant see any css for this.