Assign a Function Key Shortcut to An Action
You can assign an F key or “Function key” keyboard shortcut for any action.
To do so, select your action from the Actions Panel, then double click on the space next to the action name to bring up the Actions Options. Then select the F key that you would like to use from the Function Key drop down menu.
You can also add the Shift key or Ctrl (Mac: Command) Key to the shortcut by clicking on the corresponding check boxes.