WP Image Borders makes it easy to add decorative image borders to pictures in your blog posts.
A positive Horizontal Distance value will put the shadow on the right side of the image, but if you make this value negative, it will move the shadow the same distance to the left instead. If you create a negative value for the Vertical Distance, it will move the shadow above the image rather than below.
Border radius is the level of curvature of the image's border. A higher border radius will result in rounder corners, while a border radius of zero will result in crisp right angled corners.