Just download this tool
https://docs.google.com/file/d/0BxGcL1JOoEcyb2JRUGNKUFZpSDg/edit
it´s in french but easy to understand
looks like this
https://docs.google.com/file/d/0BxGcL1JOoEcyb2JRUGNKUFZpSDg/edit
it´s in french but easy to understand
looks like this