Your current document either has never been saved or has
not been saved since it last changed. Either:
■ Choose <Yes> to save the document, including changes.
If the document is not named, you will be prompted to
give it a filename.
■ Choose <No> to discard your changes. If your document
is new and has never been saved, <No> will discard
the entire document.
■ Choose <Cancel> to cancel the command, and return to
your document.