documentation improve (sound/audio)

[ojej]

How changing sound volume control?
mute, audio high / low

[kgilmer]

I take it this is for documenting how to do this, thanks for that. In case you don't know at this point, you can use the media keys on your keyboard and/or the volume status indicator. If you don't already have it the volume status indicator can be installed with sudo apt install i3xrocks-volume and then log back in or refresh your session. In the bar you can use various mouse buttons to change volume and mute.

In any case, I will also add this to documentation, thanks again.