diff --git a/copyme.Settings.toml b/copyme.Settings.toml
index 5296d56..21944b6 100644
--- a/copyme.Settings.toml
+++ b/copyme.Settings.toml
@@ -1,6 +1,20 @@
+# file: Settings.toml
+# Rename me !
+
+# The main key of your laser in LJ
 laser_id = 0
+
+# Activate for more debug 
 debug = "true"
+
+# Redis URL as IP:port  
 redis_url = "127.0.0.1"
+
+# Either Helios or Etherdream
 dac_family = "Helios"
-dac_id = 1
+
+# For Helios. USB Device Id of the DAC 
+dac_id = 0
+
+# For Etherdream. IP of the DAC
 dac_url = "192.168.1.68"