This is something that other popular editors have. Here is an explabnation that I "borrowed" of the net:
What is a Template?
A template is a common structure of a web site that most of your web pages use. Usually web sites follow a standard structure, for e.g. you would have a header, a navigation bar and a footer that is common to all your pages. Imagine that your site has 25 pages. If you need to make one small change, let's say adding a new link, you would need to go to each of those 25 pages and change it manually. But using a template you only need to change it in the template and all the pages get updated automatically. Here you will learn how to use templates in Dreamweaver.
This is a feature that would interest many.
Thanks!