The cog wheel in the upper right hand corner of the main page of the app. Then select the room. Scroll down and you will see the settings.

Does that apply to both S1 and S2 ?

Is the layout the same ?

A side note...   why do so many systems and apps have sub menus making it harder / slower to find the setting you need ?

Is it viable to add a over-all search

to quickly access what you need ?