diff --git a/lyx.man b/lyx.man
index 79b5484f09..ab18b930e3 100644
--- a/lyx.man
+++ b/lyx.man
@@ -65,6 +65,7 @@ where command is a lyx command.
 .TP
 \fB \-e [\-\-export]\fP \fIfmt
 where fmt is the export format of choice.
+Look on Tools->Preferences->File formats->Format to get an idea which parameters should be passed.
 .TP
 \fB \-i [\-\-import]\fP \fIfmt file.xxx
 where fmt is the import format of choice and file.xxx is the file to be imported.
diff --git a/src/LyX.cpp b/src/LyX.cpp
index e3bfe59a3e..c9f462ef90 100644
--- a/src/LyX.cpp
+++ b/src/LyX.cpp
@@ -1289,6 +1289,8 @@ int parse_help(string const &, string const &)
 		  "                  where command is a lyx command.\n"
 		  "\t-e [--export] fmt\n"
 		  "                  where fmt is the export format of choice.\n"
+		  "                  Look on Tools->Preferences->File formats->Format\n"
+		  "                  to get an idea which parameters should be passed.\n"
 		  "\t-i [--import] fmt file.xxx\n"
 		  "                  where fmt is the import format of choice\n"
 		  "                  and file.xxx is the file to be imported.\n"