The purpose of the New Document dialog box is to create a new document.
This dialog box has two tabs, with options for new document types:
The General tab contains document types you can use to create a new blank page and predesigned pages that you can use as a basis for your own pages. (For information about setting options in the General tab, see Setting options in the General tab of the New Document dialog box.) You can select a document type from the following categories:
In the case of CSS style sheets, you can copy a predesigned styles sheet and apply it to your document.
The Templates tab contains a list of your defined Dreamweaver sites. You can select a template from any of the listed sites to create a new document based on that template. For information about setting options in the Templates tab, see Setting options in the Templates tab of the New Document dialog box.