Improve sview man page, options description

doc/man/man1/sview.1

-.TH "sview" "1" "SLURM 2.3" "February 2011" "SLURM Commands"
+.TH "sview" "1" "SLURM 2.6" "October 2013" "SLURM Commands"
 .SH "NAME"
 .LP
 sview \- graphical user interface to view and modify SLURM state.
@@ -43,6 +43,13 @@ At least some gtk themes are unable to display large numbers of lines (jobs,
 nodes, etc). The information is still in gtk's internal data structures, but
 not visible by scrolling down the window.
 
+On systems with the topology/tree plugin configured, the sview command will
+attempt to display the nodes on each switch on a separate line.
+Change the sview configuration for optimal viewing by selecting "Options" then
+"Set Default Settings".
+The "Nodes in Row" and "Node Button Size in Pixels" would be the mostly
+commonly changed options.
+
 .SH "COPYING"
 Copyright (C) 2006\-2007 The Regents of the University of California.
 Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).