Hello to all,
When you select a row of pages, for example from page 7 to page 32, and on this selection you want to apply for a master page only to the even pages or the odd pages, you cannot. This master page is applied to all the even or odd pages of the document.
I worked on a book of 210 pages in 15 chapters where the page headings took each time the title of the current chapter. Instead of 15 manipulations (1 per chapter), I had to perform 220 manipulations (1 per page). Hence the suggestion.
Have a nice day, and protect yourself well.