Data tip readout with frequency for Smithchart (RF toolkit)?

I plot a smith-chart using the RF toolbox function smithchart(). I place interactively a data cursor on the trace. Now I would like the datatip to show the frequency of the current point on the trace (besides the x, y coordinates). Is there a way to do this? This is a normal capability for other Smithchart plotting tools. Or in other words, more general, is there a way to display additional, independent data using a data cursor?

Thanks a lot for any help.