Everything a-ok, got my keyboard back
And tks for the next previous section shortcuts - I'm often looking at one file multi-chapter epubs. Now I can tap Ctrl+PgDn a few times to get to Chapter 11
I guess if I have to have a cover, a generic template is better than a photocopy of page 1. But it was

and

for a minute or two, then I remembered how to lock in one colour, one pattern, one typeface, one content for all books for all time
BR