I have been adding different headers to odd and even pages in a book that I am editing. Unfortunately, I have run into problem in two of my book parts. In those parts, the header won't appear on the even number side, where I've been trying to add a field, "header 1." Although I follow the steps that work perfectly fine elsewhere in the manuscript (adding field: STYLEREF "Heading 1"); unfortunately, in these segments the header won't appear, and when I return to the setting it appears the field was never saved (although I did). Any help? Thank you so much in advance for your time. Please note that I'm working on a MAC.