Editing Server-Based Sites
Occasionally, you will want to make a change directly to a server-based site, rather than changing a local file and publishing it. With Expression Web 4, you can make the changes directly to the files that reside on the server.
One reason for editing directly on the server is that you might not have access to a computer that contains a local copy of the site. Another common reason to work on a server-based site is that you might be trying to fine-tune some server-side scripting and want to bypass the process of changing a local file, publishing it, and then checking the server-based file with a browser.
By working directly on the server, you can make your change and test it, all from within the Expression Web user interface. ...