The Set File Attribute action sets one of various attributes for the specified file.
Select the attribute to set from the Set pop-up.
File attributes available to set are:
Click the File Chooser button to the right of the action to select an existing file on disk. Option-click on the File Chooser button to show the currently selected file in the Finder (assuming it exists already).
Enter text or a text token in the to text area. Text tokens can be selected from the pop-up at the right-hand end of the text area.
The result of the action is displayed at the bottom of the action.