Dave! I found a solution.
Click on “Appearance”, “Editor” and below the “Please, you may put the CSS code here” copy and paste this and then “update file”:
img {
margin: 5px;
padding: 1px;
border: solid black 1px
}
Just change the numbers to customize it. For example: If you want the border further from the picture increase the padding to “padding: 5px” instead.
This worked for all of my pictures!
P.S. You won’t see the border within your editing page but you’ll see it when you visit your page.
Hope it works for you, take care!
