.\" /*
.\"  * Revision Control Information
.\"  *
.\"  * $Source: /vol/opua/opua2/sis/sis-1.1/common/src/sis/sis_lib/help/RCS/undo.1,v $
.\"  * $Author: sis $
.\"  * $Revision: 1.2 $
.\"  * $Date: 1992/05/06 19:04:01 $
.\"  *
.\"
.XX
undo
.PP
A simple 1-level undo is supported.
It reverts the network to its state
before the last command which changed the network.
Note that interrupting
a command (with ^C) which changes the network 
uses up the one level of undo.
