What exactly do the troff escape sequences \N and \X do?

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#2232

From: wendy.grohol
Date: Tue, 18 Dec 1990 16:03

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I am wondering what the function of \N and \X are.

I can't find specifics about them in any of my troff
books or documentation but I've used them on occasion.

For example, \N'161' in my troff documents produces an
upside down exclamation point.

\X'SetColor:red' causes the next character to be printed
in that color on color printout or it uses shading on black
and white printout.

				Thanks,
				Wendy Grohol
				
				E-mail: att!pruxk!wsg
			      Internet: wsg@pruxk.att.com

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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!pacbell.com!att!cbnewsl!cbnewsk!wsg
From: wsg@cbnewsk.att.com (wendy.grohol)
Newsgroups: comp.text
Subject: What exactly do the troff escape sequences \N and \X do?
Keywords: troff, escape sequences
Message-ID: <1990Dec18.160328.27395@cbnewsk.att.com>
Date: 18 Dec 90 16:03:28 GMT
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 17