1 files changed, 5 insertions, 0 deletions

diff --git a/documentation_en.md b/documentation_en.md
index 1cf5cfd..d65e7ad 100644
--- a/documentation_en.md
+++ b/documentation_en.md
@@ -226,6 +226,11 @@ protected for 2 seconds after each stroke.
   done, the key will remain disabled (semi-transparent and crossed) for that
   amount of time (in seconds).
 
+#### `common` key property
+
+A special entry `common` has its properties applying to all the keys. They can
+be overriden individually.
+
 ### `keys` : actions related to keys
 
 This section lets you describe for each key, the list of actions associated to