I use Audacity to analyze bird and insect songs. I often want to know the exact frequency, or frequency range, of a song element and therefore work mostly in the spectrogram window. In order to make these frequency measurements, I have to scroll the contents of the window to bring the relevant points next to the frequency scale. Or, I can try to hold a ruler level to the screen. Either way is awkward to the point of being annoying.
There are several ways this could be improved. The most obvious might be to change the cursor to a ‘long cross-hair’ that would span the full width (and height, why not) of the spectrogram window whenever ‘Enable Spectral Selection’ is active. (In any case, the acuity of a crosshair would be so much better than the I-beam when in this mode!) Alternatively, a little tick mark on the frequency scale could mirror the y-position of the cursor (whether or not ‘Enable Spectral Selection’ has been evoked) whenever the cursor is hovering over this window. Even better would be to have a little balloon over the scale giving a precise numeric frequency readout of the cursor position.