Before you can preview a frameset in a browser, you must save the frameset file and all of the documents that will display in the frames. You can save each frameset file and framed document individually, or you can save the frameset file and all documents appearing in frames at once.
To save the frameset file, select File > Save Frameset.
To save the frameset file as a new file, select File > Save Frameset As.
This saves all open documents in the frameset, including the frameset file and all framed documents. If the frameset file has not yet been saved, a heavy border appears around the frameset (or the unsaved frame) in the Design view, and you can select a filename.