Hi Paul.

Add a html field to wherever you need the border to be (top).

Give the html field a class called "border"

add the following code to the CSS section.

.border {
    border: 2px solid;
    padding: 5px;
    background: #dddddd;
    border-top-left-radius: 2em;
}

It saves the form with a border to the repository.

or you could add a simple one with the code:

.border {border-top-style: solid;}