All of you who suggested that the answer to my problem was to change my monitor resolution were correct.  The problem was deciding what resolution to set it at and still be able to read it. So i think I have reached a compromise solution with a setting of 1152 x 864.  I am now able to see all the RAW interface and my old eyes are (just about) able to read all the text.
So many thanks for pointing me in the right direction