When changing the volume (by pressing the keyboard keys) this icon pop ups, right in the middle of the screen:
I would like to change both the position and the icon, ideally to a more discreet location on the screen. I've seen other questions asking how to change the icon completely, but haven't found how to change the position and size.
Edit: I suppose whatever process works for the volume indicator also works for the brightness indicator. (Not sure if "indicator" is the right word for these icons.)