User blog comment:Thisismyrofl/Suggestion: Chat PM visibility (With working CSS!)/@comment-5085186-20130810015515/@comment-1330470-20130810161241

Many users, in order to resolve the problem without custom CSS, would close the userlist to have PMs always visible. I hope we can at least agree this is better than that!

Note that a main point of this CSS is that you can resize the userlist via the little triangle, making it modular to your needs.