Thanks RW-1.
I use eraser to delete my TIF more securely; it does not have a facility to distinguish offline content from other data. Hence I wanted to be able to delete it all.
Re saving to hard drive - the page I am trying to save is a series of lessons, to go to each succesive lesson you go to new page. Each page has a lot of graphics which need clicked on to view or enlarge. How do I use save as to get all these?
Thanks for your time