Getting started with your ".atn" file is straightforward. Here is the universal process that works for any action pack:
An .atn file is a Photoshop Action file. It records a sequence of editing steps—such as creating layers, applying filters, and changing blending modes—so you can replay them with a single click. eb-complete skin retouch action pack.atn
Run the Dodge & Burn action. It will create a "Check Layer" (usually a high-contrast black-and-white layer) to help you see transitions in skin value. Getting started with your "