enlarged image viewer too low in window

In my albums – example http://synergy.st-andrews.ac.uk/bio-images/ > Biology –
when I click on an image in the gallery the enlarged version displays low down in the browser window and cannot be seen properly.

shortcode is:
[gallery_bank type=”list” format=”masonry” show_albums=”3%2C4″ title=”true” desc=”true” responsive=”true” display=”all” sort_by=”pic_name” animation_effect=”” album_title=”true”]

https://wordpress.org/plugins/gallery-bank/