Add -scroll, -noscroll.
 [rsc] --rwxrwxr-x M 320859 glenda sys 1839 Oct 27 11:08 rc/bin/window
	/n/sourcesdump/2005/1027/plan9/rc/bin/window:81,86 - 
	/n/sourcesdump/2005/1028/plan9/rc/bin/window:81,90
	  					shift 2
	  				case -r
	  					shift 5
	+ 				case -scroll
	+ 					shift
	+ 				case -noscroll
	+ 					shift
	  				case -hide
	  					shift
	  				}
 [rsc] --rw-rw-r-- M 320859 glenda sys 14707 Oct 27 11:08 sys/man/1/rio
	/n/sourcesdump/2005/1027/plan9/sys/man/1/rio:50,55 - 
	/n/sourcesdump/2005/1028/plan9/sys/man/1/rio:50,59
	  ] [
	  .B -hide
	  ] [
	+ .B -scroll
	+ ] [
	+ .B -noscroll
	+ ] [
	  .I cmd
	  .I arg ...
	  ]
	/n/sourcesdump/2005/1027/plan9/sys/man/1/rio:120,132 - 
	/n/sourcesdump/2005/1028/plan9/sys/man/1/rio:124,145
	  .RB ( minx ,
	  .BR miny ,
	  .BR maxx ,
	- .BR maxy ;
	- .BR hide
	- causes the window to be created off-screen); and working directory
	- .RB ( cd ).
	+ .BR maxy );
	  the units are pixels with the
	  upper left corner of the screen at (0, 0).
	- The optional command and arguments define which program to run in the window.
	+ The
	+ .B hide
	+ option causes the window to be created off-screen.
	+ The
	+ .B scroll
	+ and
	+ .B noscroll
	+ options set the scroll mode.
	+ The
	+ .B cd
	+ option sets the working directory.
	+ The optional command and arguments 
	+ define which program to run in the window.
	  .PP
	  By default,
	  .I window