Is there a way to use Gmail like Google Doc

It would be nice if you can use full blown out Google Doc style on your email, so that you can use your gmail like Google Docs. It would be much more convenient too because when you open a Docs document you only see the doc, not the sidebar with the labels as you can in Gmail. So it's very navigate between different docs.

I wish Google notes still existed, I wonder why they took it away.

Is there a some sort of Gmail Lab app that makes it possible to compose on the Gmail as if it was a Google Doc? (What I would like to see is the From , To, Subject be on the bottom instead on the top; this would help with less neck-bending; as well it would be nice to be able to outline in Gmail which is not possible without having to cumbersomely press the tab button to make a new indent in the outline, instead of conveniently pressing Tab, which just activates the "SEND" button.)