I am running windows 7 and have found that when I hit the fullscreen button it does bring up the large editor part BUT the sides are not opaque. rather I can now see my desktop background and folders etc.
basically its transparent.
I thought at first it was because of my desktop settings having the transparency turned on BUT after turning that off I had the same issue.
Any ideas how I might fix it? as it stands fullscreen is not something that would help me as it doesn’t remove the distractions its supposed to.