How to plot dBFS from a wav file?

Hi all, I am able to playback a wav file on Audacity with output scale in +1 to -1. Does anyone know how to plot the wave file output with dBSF? Thanks.

There’s a little down arrow to the left of the blue waves. You can switch the display to a number of different formats.


See here in the manual for more details:

Unfortunately Audacity does not have an option to display dBFS amplitude values for a ‘normal’ (linear scale) waveform display.
The other main limitation is that in “Waveform (dB)” view, the dBFS scale is only shown for the upper half of the waveform.