How to adjust the taillight of Buick LaCrosse 09?

Does the subject want to ask "how to adjust the 09 Buick LaCrosse atmosphere light"?

1. First find the steering wheel of LaCrosse.

Secondly, the first button on the left side of the steering wheel can be turned down to the darkest or brightest.

Finally, indoor ambient light is a kind of decorative lighting, usually red, blue, green and so on. The main purpose is to make the car more beautiful at night, set off the atmosphere and create an indoor atmosphere.