I've got "corners" showing up on my document

[Rock]

I've got these things that look like corners of a square showing up on my
view of a document. They seem to be displaying the start of the horizontal
and vertical margins on the page. How do I get rid of them?

 

[garfield-n-odie]

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".