diff --git a/USB_Joystick/README.md b/USB_Joystick/README.md
index c653258..3be72b6 100644
--- a/USB_Joystick/README.md
+++ b/USB_Joystick/README.md
@@ -17,6 +17,10 @@ The 16-pin ribbon cable will have an indicator on one edge as to which is pin #1
 
 Plug your USB joystick or gamepad into the USB port on the RetroConnector Joystick Interface.
 
+The Joystick Interface will detect which axes are active on the joystick once you start to move them. The first axis it detects in order is X (horizontal), and the second is Y (vertical). On most gamepads with dual thumbsticks, this will be the left stick. 
+
+The buttons on your gamepad should each trigger either the 0 or 1 button (even numbered buttons trigger 0, odd ones trigger 1), so you can use whichever pair of buttons is comfortable.
+
 
 Calibration
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