Send the range to the standard input of the
Plan 9 command.
.TP
+.BI ^ " Plan 9-command
+Send the standard output of the Plan 9 command
+to the command window.
+.TP
.BI | " Plan 9-command
Send the range to the standard input, and replace it by
the standard output, of the
Plan 9 command.
.TP
+.BI _ " Plan 9-command
+Send the range to the standard input, and send the
+standard output of the Plan 9 command to the command
+window.
+.TP
.BI \*a! " Plan 9-command
Run the
Plan 9 command.
In any of
.BR < ,
.BR > ,
+.BR ^ ,
+.BR _ ,
.B |
or
.BR ! ,
also the escape key (ESC) selects (sets dot to) text typed
since the last mouse button hit.
.PP
+Ctrl+b switches to the command window and moves to the end
+of the text.
+.PP
The button 3 menu controls window operations.
The top of the menu
provides the following operators, each of which uses one or