What are three garnishing techniques for icebox cookies before and after baking?

Before baking, three garnishing techniques for icebox cookies include brushing with egg wash and sprinkling with sugar or nuts, pressing decorative designs with a fork or cookie stamp, and placing a whole nut or candied fruit on top. After baking, you can drizzle with a glaze made of powdered sugar and milk, sprinkle with colored sugar or edible glitter, or dip half of the cookie in melted chocolate and sprinkle with sea salt or chopped nuts. These techniques add visual appeal and texture to the cookies.