The “Tracking” tool shows the XY coordinates of a point of a curve.

Do the following steps:

1Select the “Group Delay” tab in the Views window.
2Select “Tracking” from the “Graph Tools” floating menu or the “Graph Tools” toolbar.
3With the left mouse button, click-and-drag to track the coordinates.
4Select “Tracking” again to turn it off.

Optical Fiber - Graph Tools