Why can't I find silent with one press

A

AC Question

I have allowed my MotoX android to 'system update' and now I can't find how to silence it, whereas before I just held the button on outside of phone and 3 options came up "off", "aeroplane" or "mute". It's like having a new phone not knowing where anything is, I wouldn't have updated if I'd have known!. Can anyone help please?