I don’t know the technical name for the bar at the bottom of the app: it has zoom %, words and chars displayed in the editor section and the inspector part has a great row of mode buttons, for notes, references etc…
This little bar should be used more as it’s valuable screen real estate. The icon style in the inspector part is great.
What I personally would love down there in the Editor section are three buttons for scrivenings, corkboard and outline view modes.