How to customize the placement of compose in Gmail

Question

I have Reading Pane enabled for Right of inbox, and that is slightly better, but what I need is to have the compose window over the inbox instead of below or over the reading pane.

My current layout

Desired layout

The goal is to have the compose (reply) next to the reading instead of over it. I've been popping it out into a new window to move it, but then if I click on the reading window it goes behind. It seems like there should be a way to move the compose.

I suspect this is may require some custom CSS/JavaScript, and I'm OK with that. If so, please point me in the right direction.

Answer 1

I ended up with a really crude Userscript via Tampermonkey. First time using Tampermonkey, and it works for now. I'm sure I'll revisit it later.

// ==UserScript==
// @name         Gmail compose left layout 
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       Jim McKeeth
// @match        https://mail.google.com/*
// @run-at       document-start
// @grant        GM_addStyle
// ==/UserScript==

(function() {
    'use strict';
    // Your code here...
    GM_addStyle("body > div.dw > div > div > div > div.no { float: left !important; }")
})();