When I click on a "Reply" button in my forum, it opens the "Leave a reply" panel. so far so good. The "Leave a reply" panel has an "Add Reply" button. Is there a way to add a "Cancel Reply" button that would just cancel and close the reply panel?
By using default "Leave a reply" field, you cannot cancel it, but if you use the Reply button which opens a new reply field you can press cancel button to close it, As I have noticed in your screenshot is shown the Default "Leave a Reply" field.