Index: trunk/Ohana/src/opihi/cmd.astro/cdhistogram.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.astro/cdhistogram.c	(revision 41341)
+++ trunk/Ohana/src/opihi/cmd.astro/cdhistogram.c	(revision 42942)
@@ -40,5 +40,5 @@
 
   if (argc != 7) {
-    gprint (GP_ERR, "USAGE: cdhistogram buffer R D value (min) (max) [-delta dval]\n");
+    gprint (GP_ERR, "USAGE: cdhistogram buffer R D value (min) (max) [-delta dval] [-range vec] [-binning N]\n");
     gprint (GP_ERR, " output buffer is 3D\n");
     return (FALSE);