How do I calibrate the Kinect sensor?
You can access the Kinect Tuner at any time to adjust the settings of your sensor by pausing the game and selecting Kinect Tuner, selecting Kinect Tuner in the Options menu, or via the Kinect Guide.
To open the Kinect Guide, hover your pointer over the guide icon in the lower left hand side of the screen. To find more information about Kinect, including tutorials, go to http://support.xbox.com.