I have created several masters. When trying to apply a new master, I can select my choice of master, no problem, but it will not apply to the pages chosen, it only shows the “all pages” option. Weirdly, it will allow it at the very beginning of the document. This is a book with chapters. I am applying master pages to change the running feet per chapter. I am at a dead end. This is an idml file of an InDesign file from a client, not one I originally created.