When you turn on automatic hyphenation, Word automatically inserts hyphens where they are needed in the document. If you later edit the document and change line breaks, Word rehyphenates the document.
When you choose manual hyphenation, Word searches for text to hyphenate, asks you to confirm each proposed optional hyphen, and then inserts the optional hyphens. If you later edit the document and change line breaks, Word displays and prints only the optional hyphens that still fall at the ends of lines. Word doesn't rehyphenate the document.
Hyphenating text in another language
To hyphenate text in another language, you need to make sure that the language is enabled for editing, and you also need to install Microsoft Office 2003 Proofing Tools for that language.