How to Optimize Weighting:
Transform the spectrum in Frequency Domain.
Select a few important peaks of your spectrum and zoom in. You can hide any intermediate empty region with the cutter tool.
Choose Process > Visual Weighting.
Choose Sensitivity or Resolution.
Move the exponential slider to the right and observe how the spectrum changes. Stop when you are satisfied.
If the peaks become too high, press the minus key. You can use all the usual navigation keys (plus, arrows, Home, End, et...) to observe what happens in other regions of your spectrum. This is always possible on the Mac. To make it possible on Windows, click on the word “interact”.
If you are optimizing for resolution and it is never enough, move the Gaussian slider to the left.
Apart from this case, it is never necessary to use the second slider. It's there to offer more freedom, but you can ignore it if you prefer the simplicity of a single-parameter adjustment.
If the slider reaches the end of the run and you need more, close this dialog, choose File > Repeat, then Process > Fourier Transform and change the numerical value of the Exponential weight.
You can optionally add a sine bell, a cosine bell, etc...