diff --git a/tetawebapp/tetawebapp.py b/tetawebapp/tetawebapp.py
index 8394307..2c6978a 100755
--- a/tetawebapp/tetawebapp.py
+++ b/tetawebapp/tetawebapp.py
@@ -26,7 +26,15 @@ app.secret_key = 'ce1d1c9ff0ff388a838b3a1e3207dd27'
 db = SQLAlchemy(app)
 
 ########################################################################
-# Menu management
+# Menu management:
+# ----------------
+#
+# The main menu is a list of lists in the followin format
+# [string caption,  string URL endpoint, int 0]
+# - The URL end point MUST match the function called by the corresponding
+# route.
+# - The int 0 is used to determine which menu entry is actally called.
+#   The value MUST be 0.
 ########################################################################
 
 def get_menu(page):
@@ -52,7 +60,11 @@ def get_menu(page):
   return menu
 
 ########################################################################
-# Routes
+# Routes:
+# -------
+#
+# Except for the index fonction, the function name MUST have the same
+# name than the URL endpoint to make the menu work properly
 ########################################################################
 @app.errorhandler(404)
 def page_not_found(e):