I'm working on a book with 20 chapters (documents) and lots of endnotes. The endnotes are chapter-specific and come at the end of each chapter. They start at number 1 in each chapter. I would like to change that and move all the endnotes to the end of the book, to a new chapter called Chapter 21: Endnotes. When I move the endnotes to chapter 21, their reference number is changed to <?>. I can change <?> to continuing numbers, but when I delete the original endnote frame after having moved the endnotes to chapter 21, I lose all reference numbers in the text frame. Is there a way to move the endnotes to a new chapter (document), without losing the reference numbers?