HOW TO INSTALL photoshop actions
Step 1. After you’ve downloaded the zip file(s), you’ll need to unpack the contents of the file(s). This should reveal a new folder containing the atn file(s) Double-click on the action file(s) .atn file(s) and it will be installed in your Photoshop.
Step 2. Within Photoshop open the actions panel: Windows > Actions (Option + F9 / Alt F9) and you should see your Action file appear in the list.
Step 3. With the document open that you wish to use the action on, select the action from the panel menu and press play.