diff -u b/table_element.module b/table_element.module
--- b/table_element.module
+++ b/table_element.module
@@ -224,6 +224,8 @@
  *
  *   // Optionally, to add tableDrag support:
  *   $form['table'][$row]['#attributes']['class'][] = 'draggable';
+ *   $form['table'][$row]['#cell']['colspan'] = '2';
+ *   $form['table'][$row]['#cell']['class'][] = 'td-element-class';
  *   $form['table'][$row]['weight'] = array(
  *     '#type' => 'textfield',
  *     '#title' => t('Weight for @title', array('@title' => $thing['title'])),