I know the Church took pains to figure these out, but I generally kiss the lower right corner of a "portrait" icon. group icons I kiss without kissing any one in particular. Christ icon I kiss His hand or His feet. But it really doesn't matter, does it?
I would NOT call this a full prostration. Even with the hand
It is considered prostration, and is listed as prostration in Orthodoxwiki. Again, as is the case with the bow, a 'small' bow is a sign or reverence, but a deep bow (as in when the Holy trinity is invoked) is a sign of worship.
At no time should Mary or any Saints (like at the prayer of the Dismissal) receive higher reverence than God, whether it is a bow, or prostration.
well depending what you’d call a deep bow (as well as what the average bow is in our parish) i don’t think we disagree much if at all.
as i recall its the feeet if they’re shown if not hands, if not hands hair. i forget if there’s multiple saints pictures, and usually aim for hands and feet of each. assuming that folks wearing lipstick haven’t smeared it all over the icon, at which point i generally go close to each.