Split Screen in Compose Mode

I like working in Compose mode, but usually need my notes open in another pane.
Would love to have the option to split the screen in Compose mode.

In Compose, you can move the paper to one side and open beside it a Quick Ref panel. Not quite the same thing but it might accomplish the same purpose.

ps

Thank you!

Also found this article: http://www.simplyscrivener.com/tag/quick-reference-panels/

Note also that you can have more than one QR panel at a time open beside text in Compose Mode.

ps