HI everyone ! 

I would like to modify Tizen OS, especially the UI interface for professional purpose.

For example, I want to set the watch (Gear S2) to have always my app lunched. If you reboot the watch, I want to have my brand introduction, and then my app lunched automatically with no view on the home screen. So I think I have to rebuilt Tizen OS to work as I want. But where to find the files ? And more important, how to know what I have to modify ? Is there any documentation about that ? 

What should I do to do so in the big lines ?

Thanks a lot ! 😉