See
http://support.microsoft.com/?kbid=839371 "Margin marks or
crop marks appear on each corner of the page when you open a
document in Word 2002 or in Word 2003".
Paul in MN wrote:
I'm using MS Office 2003. For about a year my print layout displays L-Shaped
indicators at the four corners of the margin. I don't know how these got
there. These indicators do not print, but they are annoying and I want to
get rid of them. Any suggestions on how to eradicate them from my print
layout view?