Newbie seeks single action "Undo" feature in Early Access Blur

Hello! I admit I'm a beginner to Lightroom, and maybe I missed this in a tutorial...but could anyone please tell me if there is an "Undo" feature for a single action/change to a photo in the Early Access Blur feature? It seems as if I make multiple adjustments for a photo, and I can't undo any one change by itself. I would really appreciate some enlightenment in this area. Thank you!