diff --git a/plotting/layout.R b/plotting/layout.R
index 9c534371fa14b77c0e2605679393c147de4f6177..0f0271a3a8a98d1c6c52896c87b637742223f9e0 100644
--- a/plotting/layout.R
+++ b/plotting/layout.R
@@ -23,7 +23,10 @@
 #
 # plotting/layout.R
 #
-#
+# Regroups general parameters about plotting like the theme used ang
+# color management. It mainly deals with the calling to specific
+# plotting functions and the organisation of each plot for the
+# generation of the PDF.
 
 
 # Usefull library