From MediaView, select File > Open > Media to open a .avi file.
From the Marker Tracing panel, click Add to add a
marker.
Click a pixel on the screen. Choose something with a high contrast to
neighboring pixels, for example, corners or CG markers are good choices.
Click Apply.
MediaView determines the location of the markers
during the movement of the video. If you animate or step forward through the
video, the markers follow along the lines of the analysis.