Power CMS allows you to create Content Templates, When you create new Content (Click the green plus button next to Content) there is a check box for "Use as template"
This allows you to set up a template page, you can then create new pages from the template. there is one physical page that you will need to create, and add the developer notes to, when a new page is created from the template, a url variable is passed to tell the CMS system what page top load.
There is not automatic functionality for adding new template pages to the menu or removing them, but it can be added manually. see the following post for details: