Andrew Jameson said:
Honest question (asked of the general populace, not necessarily James in particular): what are the advantages and conveniences of keeping your chapters in seperate files?
I fairly often check back and forth for some bit of business or 'nother (was she wearing a blue dress, or green?) to maintain consistancy, and jot notes to myself, and so forth, and having the entire manuscript open works for me. I honestly can't think of any downside, unless you just don't like dealing with files that are ~1 meg or so.
Having the entire manuscript open also works for me when actively writing, but there are times when I need separate chapter files.
One of the advantages of separate chapter files is, as I said, that publishers sometimes want them this way, and it saves work later on. A bigger advantage, however, is that separate chapter files makes it very easy to send someone, agent, editor, or reader, specific chapters with a quick click.
And having separate chapter files ready to go makes computer to computer editing much easier, especially when you're doing it in real time with a beta reader, agent, or editor.
But the main reason I keep chapter by chapter files is that I never know when an agent or editor will ask for the thing filed this way, or just for specific chapters. Since it's very easy to keep chapter by chapter files, and a complete document, I have both at all times.
Oh, and as azbikergirl says, there are times when being about to view two chapters at once is very handy, and chapter by chapter files makes this quicker and easier.