You can open an existing web page or text-based document, whether or not it was created in Dreamweaver, and edit it in either Design view or Code view.
If the document you open is a Microsoft Word file that was saved as an HTML document, you can use the Cleanup Word HTML command to remove the extraneous markup tags that Word inserts into HTML files.
To clean up HTML or XHTML that was not generated by Microsoft Word, use the Cleanup HTML command.
You can also open non-HTML text files, such as JavaScript files, XML files, CSS style sheets, or text files saved by word processors or text editors.