Many thanks for your help, Bob. As I don't know what are "A and B fields", I think that I'd better save as 1.0. I might want to send the GEDCOM to my brother-in-law, so would want him to see all the included text. I don't send GEDCOMs nowadays to people other than immediate family because once upon a time I did so and someone 'pinched' the lot! Now I email reports to people by rich text format.
By the way, would you know why the display is appearing down the bottom of the page?!