Right now we’re just able to define Min/Max frequency within Preferences > Spectrograms.
But fixed frequencies are not ideal if working with files with different sample rates and we want to see the entire Spectrum of the file after opening them. So an additional option “Zoom to Fit” here would be ideal!
There are online tools to visualize audio spectrums. One of the first is here: Spectrum Analyzer | Academo.org - Free, interactive, education.
Nice, but no need for 3-rd party tools since Audacity already has usable built-in Spectrum Analyzer 