That’s the sort of info they normally put in the manual. 

try Settings/System/roomname and then Trueplay. 

Note that there are two types of TruePlay, one from the speaker’s microphone, and the other using an iOS device only. 

Yes, that is exactly the type of info that one would expert to find in the user manual.

But, upon reading the Sonos tech info, I now find that I can only use TruePlay from an Apple phone not my Android.  I see in a recent reply that maybe I can use TruePlay using the speakers microphone.   I will try this tomorrow.  Thanks

Are you looking at the Era 100 manual?

https://www.sonos.com/en-us/guides/era100

or the Sonos FAQ?

https://support.sonos.com/en-us/article/tune-your-era-100-or-era-300-with-trueplay