Board Thread:General Discussion/@comment-4482373-20130828153156/@comment-3030984-20130828160226

Communtiy Central is using Darwin, a new project which allows the width and layout of a wiki to change depending on your screen size. A current bug of Darwin is as you describe - the edit preview is rather narrow. This will hopefully be fixed soon.

For more information, see the blog linked above, or visit the Darwin forum.