Frames divide a web page so that different files can be loaded into defined areas on the same page. Frames commonly define a navigation area and a content area for a page.
When you split a document into frames, Dreamweaver creates an untitled frameset file and untitled documents in each of the new frames. What a user sees as a single web page with two frames is actually three separate files: the frameset file and two files containing the content that appears inside the frames.
A frameset is a file that defines a web page with frames. A frameset stores information about the size and location of the page's frames along with the names of the files that should be loaded as the content for each of the frames.
Click Show Me for an introduction to creating frames.
You can change the properties of frames and framesets, resize frames, and use links to control their contents.
When View > Frame Borders is off, the frameset appears exactly as it does in a browser. When frame borders are displayed, Dreamweaver adds space around the document for the border and widens small borders for easier dragging and selecting.