How can I make the form round?

To make the corners of the form round, add this code to your form:

http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

.form-all {
border: 1px solid gray;
border-radius: 15px 15px 15px 15px;
}

Increase the border radius to round off the corners further.