Using Dynamic Web Templates
A DWT is a good way to template a Web site, because all the work of combining the template file and the content files occurs locally, on your computer, while still letting you see many of the same results produced by the server. DWTs let you control the layout and global elements of multiple pages from one centralized template file.
A DWT also enforces your layout on all the pages to which it is attached. This results in a more convenient workflow when someone other than the designer edits the page content.
You can also change the layout and format of every page attached to the template by modifying the DWT. Site mockup, redesign, and maintenance become much more manageable when you use a template or set of templates. ...