I can update everyone regarding my comment below about - Not being able to manipulate Enlarged Images.

I have received this noet from the Librarian:
"To enlarge/decrease the image, you use the plus and minus signs to the top right of the screen. Then once you have zoomed in or out, you click on the image itself, hold the click and then drag the image left/right/up/down as required for viewing."

Brilliant....

Tim Radford