Thank you! Thank you! Thank you!
NO Edit or below that - the File/Edit, etc's.
With the editor open I Finally located it on the monitor screen on top where it shows firefox and so forth.
I was overlooking it when I looked there before.
But there I found: File/View and now I have the Preview back.
Command/p takes me to the Preferences for Edit book, but I can't find to Customize like the Menu bar I see on your Editor.
But no matter. I'm HAPPY again.
And I've learned something new.