I've finally figured out how to handle the X-Ray feature. It's not available in the KDP author dashboard until the book is loaded and ready, so you have to make it available for sale or pre-order if you want to be able to run the X-Ray tool. At the same time, you are locked out of making changes several days before the delivery date, so you need to set that far enough ahead that you can do all your corrections and reload the file well before that date. With all the alien words in this series, X-Ray is crucial!
I always give my proofreader a copy of the formatted print pages as she finds that much easier to proof from than a Kindle copy.
