Why does my messages app have no settings or menu?

[AC Question]

Every time I get a text, I get a repeated loud annoying emergency alert and I don't know how to change it. I open the ap but there's no menu there with settings to change it.

 

[Tim1954]

They all have settings menu. What device /software have you got? Mostly you open messages app.... More.... Settings... Sounds and alerts...
You can also change the volume of the alert by pushing volume button, then the down arrow icon... Notifications...