I wonder, since post id is optional - if post id is not included then it uses the current post. Since this is data from the setting page it wouldn't be present in a post. So for data from a settings page there must be some other parameter to pass in the shortcode which tells to grab data from settings not post?
thank you. When placing this on let's say - the home page - what would the object id be? The home page's post id? If so, how would you use the setting shortcode in something like a footer where the object id is different everytime?