Index: trunk/ppStack/src/ppStackArguments.c
===================================================================
--- trunk/ppStack/src/ppStackArguments.c	(revision 13593)
+++ trunk/ppStack/src/ppStackArguments.c	(revision 13611)
@@ -18,5 +18,5 @@
     fprintf(stderr, "\nPan-STARRS Image combination\n\n");
     fprintf(stderr, "Usage: %s INPUTS.mdc OUTPUT_ROOT\n"
-            "where INPUTS.mdc contains:\n"
+            "where INPUTS.mdc contains various METADATAs, each with:\n"
             "\tIMAGE(STR):  Image filename\n"
             "\tMASK(STR):   Mask filename\n"