y-axis scale in spectra

Hello, is it possible to fix the y-axis range in the spectra produced by Analyze / Plot spectrum? I alway get a range of -90 dB to the signal max, which is variable, and this makes it difficult to compare spectra of different portions of the signal. Also, my actual minima are often lower than -90dB, specially at high frequencies, and thus off-scale.
Many thanks,
Andrea …
Audacity 3.0.0, same behaviour on Mac OS high sierra or big sur

I’ve moved this to the “adding features” section of the forum.

I agree that it would be useful to be able to turn off the automatic y-axis scale and set it manually.