Editing actions

Is it possible to edit an action step? I know I can delete existing steps and, by setting the current step and recording, add a step, but what I am asking about is actually editing a single step.

For example, in my attempt to learn about using and recording actions I created a shadow mask using a gradient map and a newly created shodows gradient. If I coud edit one of those steps by changing the selected gradient name to something else I could duplicate the steps and create midtone and highlists masks as well without having to record all of the indiviual steps for midtones and highlights.

As of now I have not found any way to do that, but then I am new enough to Photoshop that I might not know where to look.