Create A New HTML5 File
You can create a new HTML 5 document in Dreamweaver (Page Type: HTML, DocType: HTML5) and set it up as follows:
Using Dreamweaver To Create The File
however Dreamweaver has better support by selecting 'File' > 'New' > 'Select Page From Sample' > 'Mobile Starters'
Preview of interface
Menu > View > Live View
Code syntax assistant
The area in which the page fits. A mobile friendly website shouldn't need to be zoomed in or out, at least to start with the visible area equal to the devices screen width.
1:1 scale and with user not allowed to change the scale with gestures or buttons:
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" >
A page is just a div element with a specific role. One HTML document can host one page or many pages inside the same file.
Roles define what the framework should do with tags such as div tags that are used. E.g.
Note that roles are not part of HTML5, they are part of the jQuery Mobile framework.