[ubuntu-uk] explain this then

[norman]

I loaded a collection of photographs into an empty folder and, instead
of appearing as thumbnails, they appeared as icons which looked like a
sheet of printed paper with the top right hand corner turned down and a
clock at the bottom right hand corner with the hands at 5.00. I dragged
one of the icons onto the desktop, opened it with an image viewer and
the photograph duly appeared. After closing the image the icon was then
dragged back into the folder where it changed to a thumbnail. This
happened on every instance and I wonder why?

Norman