How to go back and edit specific effects

I’m using the latest version of Audacity on a Mac OS 10.6.8, and I’m having a problem with this:
Whenever I put an effect on something, like for instance a reverb then a delay, and then later on I want to go back and take out one of those, I can’t find any way to specifically find the particular effect; I literally have to go to ‘edit’ and back-track my steps and take out each effect 'til I get to the one I want, as opposed to being able to find a list of them and choosing which one to take out. Hope that makes sense. Let me know if you know of a solution for this!

The history window may be what you’re looking for.

You still can’t “take out” one effect (leaving everything else in between), but you can at least quickly back up (undo) to the effect you want to do over.

– Bill

A useful technique that I regularly use for reverb (and sometimes some other effects) is to create a separate reverb track.
To do that, select the track that you want to apply reverb to, and duplicate it (probably “Command+D” on Mac). Then apply the effect “all wet” to the duplicate (the built-in reverb effect has a “Wet Only” checkbox).
The amount of reverb can then be changed at any time by adjusting the track Gain slider, or can be removed completely by deleting the reverb track.

This “trick” is not suitable for all effects (I wouldn’t use it for Equalization, Compression or Noise Removal), but it can be used for any effect in which you want a mix of “Wet” (processed) and “Dry” (unprocessed original audio).