Even modestly sized documents may have several different kinds of pages. To serve as a form of template for those kinds of pages, InDesign offers Master Pages. Content placed on a master page will appear on all the pages that use that master. Much of my time preparing a document is spent on the master pages of that document. Among the items that are best put on master pages are running headers (see “Running Headers” (page 327)]) and Guides. When we create a system of guides on a master with the Layout > Create Guides… command, those guides will appear on every page to which the master has been applied.
Some documents, like this one, have at least several kinds of pages: pages tailored for front matter, tables of ...