See yesterday's piece for background.
Not too complicated, now that I know how it's done.
When I was fumbling around I did click on the hamburger. As my eye skimmed it, I concluded it was for hopping around the current book. I didn't study it carefully enough.
On the other hand, I had gone through my fumbling around with the Kindle app many months ago, and wasn't prepared for something that had become second nature to require more fumbling. I still think they were wrong to pull the rug out from under me. They probably won't make any less money, but I think they're not friendly to their customers, something I think Amazon really goes out of their way, usually, to try to be.