full screen off pictures

Hi
I know maybe I am the 1.000 person which has the problem that pictures are not shown in full view.
https://www.feuerwehr-gloggnitz.at/schaukasten2.0/?foyer_display=raika
Need this solved as we are a volunteer fire department and want to use foyer to provide our work to the public.
Thanks a million for your reply
Thomas Rauch, fire chief

The page I need help with: [log in to see the link]