I don't know if it's the same mechanism that works the moonroof in the Camry. If it is, then it opens totally with a touch of the button. To close though you have to keep the button down. It'll stop halfway and then you have to redepress the button for it to close all the way.
To tilt you pus the button once and it tilts open. Hit it again and it tilts more. There are two tilt angles possible.