Do you document it somewhere or is this for much latter ?

Well, you can see some examples by checking the RTExample class. Also, in every builder there are a couple of examples.

There is also the new example browser. A few screenshots:

--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.