When you make changes to and save a template, all the documents based on the template are updated. You can also manually update a template-based document or the entire site if necessary.
Use the Templates category of the Assets panel to manage existing templates, including renaming template files and deleting template files.
You can perform the following template management tasks with the Assets panel:
Create a template
Edit and update templates
Apply or remove a template from an existing document
Dreamweaver checks template syntax when you save a template but it’s a good idea to manually check the template syntax while you’re editing a template.