No sound and how to diplsay notes


I’m new cubase user and have two questions:

  1. How to display note names?

I read some about this topic. I was told to zoom the piano editor but it did not help.
Also i was told to find “Note Expression” icon and turn that on/off but i can’t find it.

  1. After my first minutes with coinbase i have no audio anymore.

Before it worked fine. I have setup VST audio outputs to my audio device “Realted High Definition Output” like this:

Tried switching drivers to ASIO4ALL etc. I have theory that i triggered some mighty button which is disabling audio output as when i check if there’s any output coming using Windows Device Manager (the green bars in audio device manager) there’s nothing:

Any theory what’s going on?
I use cubase elements 9 trial.