Suddenly, a blank horizontal line is appearing at the end of text boxes and
again at the end of the document. It spans the width of the box or document.
Any idea why or how to remove it?

KasiaT wrote:
Suddenly, a blank horizontal line is appearing at the end of text
boxes and again at the end of the document. It spans the width of the
box or document. Any idea why or how to remove it?

It sounds like your Normal paragraph style has a bottom border. Select the
whole document, go to Format Borders & Shading, make sure the Apply To box
says "Paragraph", and click None.

If it happens in all new documents, this may be yet another strange case of
the "blank document not blank" problem, but with formatting instead of text.
See http://word.mvps.org/FAQs/AppErrors/...ocNotBlank.htm for ways of
dealing with it.

--
Regards,
Jay Freedman
Microsoft Word MVP FAQ: http://word.mvps.org