I don’t know where I heard it first, but they said you could move the bar onto a second screen. And it sounded like such a great idea, however I tried it only now and I wasn’t able to move it off the screen. I use three monitors in extended mode and dragging one window from one display to another is trivial operation. But I couldn’t drag the composer bar to the second screen. Cursor moves, but bar doesn’t follow.
I found this post illuminating on the subject: Composer disappears when dragging it to another screen - #4 by litecode