Index: trunk/Ohana/src/opihi/cmd.data/write_vectors.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/write_vectors.c	(revision 42124)
+++ trunk/Ohana/src/opihi/cmd.data/write_vectors.c	(revision 42127)
@@ -102,5 +102,5 @@
   if (argc < 3) {
     gprint (GP_ERR, "USAGE: write [options] file vector vector ...\n");
-    gprint (GP_ERR, "OPTIONS: [-header] [-append] [-f \"format\"] [-fits NAME] [-csv] [-h,--help]\n");
+    gprint (GP_ERR, "OPTIONS: [-header [buf]] [-append] [-f \"format\"] [-fits NAME] [-csv] [-h,--help]\n");
     return (FALSE);
   }
@@ -289,8 +289,8 @@
  usage:
     gprint (GP_ERR, "USAGE: write [options] file vector vector ...\n");
-    gprint (GP_ERR, "OPTIONS: [-header] [-append] [-f \"format\"] [-fits NAME] [-csv] [-h,--help]\n\n");
+    gprint (GP_ERR, "OPTIONS: [-header [buf]] [-append] [-f \"format\"] [-fits NAME] [-csv] [-h,--help]\n\n");
 
     gprint (GP_ERR, "OPTIONS: \n");
-    gprint (GP_ERR, "  -header : add a descriptive header line to ascii or csv output\n");
+    gprint (GP_ERR, "  -header : add a descriptive header line to ascii or csv output (see below for FITS)\n");
     gprint (GP_ERR, "  -append : write to the end of the existing file\n");
     gprint (GP_ERR, "  -fits NAME : write a fits table (extention name is NAME, column names match vector names)\n");