diff --git a/ArduCopterMega/APM_Config.h b/ArduCopterMega/APM_Config.h
index a14942428b..a5456f803e 100644
--- a/ArduCopterMega/APM_Config.h
+++ b/ArduCopterMega/APM_Config.h
@@ -7,12 +7,19 @@
 //#define MAG_ORIENTATION		AP_COMPASS_COMPONENTS_DOWN_PINS_FORWARD
 
 #define NAV_TEST 0	// 0 = traditional, 1 = rate controlled
+
 #define FRAME_CONFIG QUADX_FRAME
+	/*
+	options:
+	QUADP_FRAME
+	QUADX_FRAME
+	TRI_FRAME
+	HEXAX_FRAME
+	Y6_FRAME
+	HEXAP_FRAME
+	*/
 
 #define CHANNEL_6_TUNING CH6_NONE
-
-//#define CHANNEL_6_TUNING CH6_PMAX
-
 	/*
 	CH6_NONE
 	CH6_STABLIZE_KP