In the new WordPress 3.9 version the folks removed the ability to add padding and borders around photos. Would you believe that it’s considered an improvement?
So many people have complained, but for this solution there are a plugin, that adds back the functionality that the “improvement” took out. It’s the Advanced Image Styles plugin. And guess what? You’ve got more control with this plugin than you did with the old image interface. Just click on “Advanced Options” and you’ll see that you can control the margins on each side of the image separately. You can even do colored image borders with a border width of your choosing.
Thanks God! It’s free to use this great plugin.
Get Advanced Image Styles Plugin