+Checking if form data has changed
+---------------------------------
+
+.. method:: Form.has_changed()
+
+Use the ``has_changed()`` method on your ``Form`` when you need to check if the
+form data has been changed from the initial data.
+
+ >>> data = {'subject': 'hello',
+ ... 'message': 'Hi there',
+ ... 'sender': 'foo@example.com',
+ ... 'cc_myself': True}
+ >>> f = ContactForm(initial=data)
+ >>> f.has_changed()
+ False
+
+When the form is submitted, we reconstruct it and provide the original data
+so that the comparison can be done:
+
+ >>> f = ContactForm(request.POST, initial=data)
+ >>> f.has_changed()
+
+``has_changed()`` will be ``True`` if the data from ``request.POST`` differs
+from what was provided in :attr:`~Form.initial` or ``False`` otherwise.
+
Accessing the fields from the form
----------------------------------