Thanks for your reply !
I tried that but it doesn't really work on a 4k screen.
I was hoping that I could lock the title bars and make the Fences stick to each other and to the edge of the screen.
At the moment the Fences need quit some space.
It's pretty annoying if the title bar moves to the bottom because in Microsoft Windows all the title bars are always at the top.
So far as I know on a Mac and linux too ? Anyways, for me it is a bit confusing when the title bar is at the bottom.