POP-OUT WINDOWS in GMAIL are the best! I use them all the time to make it easier to work in GMAIL!
Besides clicking the Full-screen symbol with the shift key for a Pop-Out Window, you can also click the Full-screen symbol alone. When you do this, it will open the Compose window larger and it will take up your full screen. This can be really helpful when you need more room to type or when you don't want the distraction of seeing other emails behind your Compose window.
