Updating Templates
When you edit a template, you will probably get a dialog box asking you if you want to update the pages that refer to your template, if you have no pages referring to your template yet, you will not get the dialog box.
It is a good idea to let Dreamweaver update the pages connected to your template, that is kind of the point of using a template to begin with. But you can always say "no". If you change your mind, open the page that you need to update and select Modify>Templates>Update Current Page. To update many pages, select Modify>Templates>Update Pages