Roy,
Tools>Options>View>Show>Status Bar. Check it.
The TRK display on the status bar is solid black when Track Changes is
active and dimmed when inactive. You can use it to toggle.
There are lots of things that can cause lines under words. Especially if
you have a loose definition for lines. From Word Help:
What do the underlines in my document mean?
If text on your screen is underlined, but you didn't apply underline
formatting to it, it could appear as underlined for any of the following
reasons.
Red or green wavy underlines
When you automatically check spelling and grammar, Microsoft Word uses
wavy red underlines to indicate possible spelling errors and wavy green
underlines to indicate possible grammatical errors.
Red wavy underlines in an e-mail header
Word automatically checks the names in the e-mail header against names in
the Address Book. If multiple names are found that match the name you type,
a red wavy line appears under the name, indicating that you must choose a
name.
Blue wavy underlines
Word uses wavy blue underlines to indicate possible instances of
inconsistent formatting.
Purple wavy underlines (wavy vertical lines may also appear in the margin)
In an XML document, Word uses purple wavy vertical lines and underlines to
indicate XML structure that does not adhere to the XML schema that is
attached to the document.
Note XML features, except for saving documents as XML with the Word XML
schema, are available only in Microsoft Office Professional Edition 2003 and
stand-alone Microsoft Office Word 2003.
Blue or other color underlines
Hyperlink display text is blue and underlined by default.
Purple or other color underlines
Followed hyperlinks appear as purple and underlined by default.
Red or other color single or double underlines (vertical bars may also
appear in the left or right margin)
By default, newly inserted text is marked as underlined when the Track
Changes feature is used. Vertical bars- called changed lines- may also
appear in the left or right border of text that contains tracked changes.
Purple dotted underlines
Smart tags appear with purple dotted underlines beneath text. You can use
smart tags to perform actions in Word that you'd normally open other
programs to do.
