Index: trunk/tools/czarplot.pl
===================================================================
--- trunk/tools/czarplot.pl	(revision 28760)
+++ trunk/tools/czarplot.pl	(revision 28762)
@@ -48,5 +48,5 @@
     print "* OPTIONAL: choose time interval in past    -i <'1 hour'|'1 day'|etc>   (default=interval since 7am this morning)\n";} 
 if (!$begin) {
-    print "* OPTIONAL: choose a begin time             -d <datetime>               (default=7am this morning)\n";} 
+    print "* OPTIONAL: choose a begin time             -b <datetime>               (default=7am this morning)\n";} 
 if (!$end) {
     print "* OPTIONAL: choose an end time              -e <datetime>               (default=now)\n";}