yapi/client/components/Postman/Postman.scss

.postman {
  .pretty-editor {
    border: 1px solid #d9d9d9;
    border-radius: 4px;
  }
  .pretty-editor-body {
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    min-height: 300px;
  }
  .pretty-editor-header {
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    min-height: 200px;
  }
}