Saturn Outlook 2009 dome light button

I just bought a 2009 Outlook XE. The dealer or the factory disabled the dome light to turn on automatically when the any of the doors open. I read the manual over and over again without understanding that the dome suppression button was located on the upper part of the back panel of the dimmer nob.

Here's a picture of the button coloured in blue.


The dealer said this question keeps coming back over and over.

Hope this post will help someone.