* I want to make a very small change (e.g. 10.00 --> 10.01), and the slider is too clumsy.
* I want to use an exact value that's worked well for that parameter in the past.
* I want to tweak a value, then decide against it and return to the exact value I had before the tweak.
If there's already a way to directly input numbers, then my request is to make the technique more obvious to oblivious users like me

Thanks!