diff -Naur -Naur screen/src/doc/screen.1 screen.modified/src/doc/screen.1
--- screen/src/doc/screen.1	2009-07-05 22:28:18.000000000 -0600
+++ screen.modified/src/doc/screen.1	2009-07-06 21:17:34.000000000 -0600
@@ -2305,11 +2305,12 @@
 the display and redisplay the updated window contents.
 .sp
 .ne 3
-.BR "number " [ \fIn ]
+.BR "number " [[+|-] \fIn ]
 .PP
-Change the current windows number. If the given number \fIn\fP is already 
+Change the current window's number. If the given number \fIn\fP is already 
 used by another window, both windows exchange their numbers. If no argument is
-specified, the current window number (and title) is shown.
+specified, the current window number (and title) is shown. Using `+' or `-'
+will change the window's number by the relative amount specified.
 .sp
 .ne 3
 .BR "obuflimit " [ \fIlimit ]
diff -Naur -Naur screen/src/doc/screen.texinfo screen.modified/src/doc/screen.texinfo
--- screen/src/doc/screen.texinfo	2009-07-05 22:28:18.000000000 -0600
+++ screen.modified/src/doc/screen.texinfo	2009-07-05 22:37:03.000000000 -0600
@@ -4475,11 +4475,13 @@
 @node Number, Silence, Nonblock, Miscellaneous
 @section Number
 @kindex N
-@deffn Command number [@var{n}]
+@deffn Command number [[+|-]@var{n}]
 (@kbd{C-a N})@*
 Change the current window's number. If the given number @var{n} is already
 used by another window, both windows exchange their numbers. If no argument is
-specified, the current window number (and title) is shown.
+specified, the current window number (and title) is shown. Using either a
+plus (`+') or minus (`-') will change the window's number by the relative
+amount specified.
 @end deffn