Index: /trunk/FACT++/src/fitsdump.cc
===================================================================
--- /trunk/FACT++/src/fitsdump.cc	(revision 12007)
+++ /trunk/FACT++/src/fitsdump.cc	(revision 12008)
@@ -761,5 +761,4 @@
             return -1;
     }
-
 
     if (conf.Get<bool>("list"))
@@ -1046,5 +1045,5 @@
 #endif
                                                   , "Name of input table")
-        ("col,c",       vars<string>(),             "List of columns to dump")
+        ("col,c",       vars<string>(),             "List of columns to dump\narg is a list of columns, separated by a space.\nAdditionnally, a list of sub-columns can be added\ne.g. Data[3] will dump sub-column 3 of column Data\nData[3:4] will dump sub-columns 3 and 4\nOmitting this argument dump the entire column\nnota: all indices start at zero")
         ("outfile,o",   var<string>("/dev/stdout"), "Name of output file (-:/dev/stdout)")
         ("precision,p", var<int>(20),               "Precision of ofstream")