The nearest thing is the piano keyboard that is drawn along the edge of the spectrogram if you have the vertical scale set to logarithmic. This shows middle C (in light blue) and the other Cs (in grey).
If you activate the Measure tool, you can then wave the mouse over the spectrogram and see the current position reported in note terms as well as Hz.
The tuning frequency for these calculations can be adjusted in the preferences (Analysis tab, "Frequency of concert A").
Chris