After much frustration I have finally found in the Mac help system a document describing Keys for editing and moving text and graphics
In the spirit of sharing, I attach it here. At last, I can highlight to the end of a line again - life is suddenly easier.
My biggest problem remains the size of the type and the fact that it changes so much between applications. I've been looking for a setting which will make everything a default zoom of, say, 125%, but still haven't found it. The accessibility section hasn't helped. I guess I am probably missing something obvious.
I did however find out which one is the Option key. Why don't they write it on the keyboards?!
