The ability to change the Editor window background color and opacity would make a great workflow improvement and allow you to view the changes you are making whilst still having the Editor at full size.
+1
i actually listed transparent editor as one of my main reasons for using QC, in the survey Vuo sent out a long time ago… as a joke really.
but yes, it would make useful sense!
In Vuo 1.1, we added the ability to make the editor window semitransparent.