Although the iOS Mail app is great for its general simplicity in letting you view, manage, and send emails, the “single-window” design of iOS itself has traditionally created a workflow limitation that desktop mail users don’t normally encounter — the ability to flip back over to your mailbox to look things up while you’re in the middle of composing an email. Until recently, the only way to deal with this would be to save the current email in progress as a draft, go find what you want to in your mailbox, then bring up your drafts again and pick up where you left off. While there is a pretty fast way to access your drafts, this is more of a hassle than it needs to be.
The good news is that iOS 8 has added a nifty little feature to address this very issue. The New Message screen now opens up in what is basically a separate panel that you can move down and out of the way. To do this, simply tap and hold on the title of the new message panel and drag it down toward the bottom of the screen. You can either drag it part way down to “peek” at whatever was behind it — perhaps the e-mail you’re replying to or referencing — or drag it all the way to the bottom of the screen to park it down there, at which point you can browse your mailbox as you normally would, even changing folders or composing more new email messages. When you want to get the original message back, just tap on the title bar of the New Message panel where it’s resting at the bottom of the screen, and it pops back up, ready for you to continue right where you left off.
In fact, you can even open multiple New Message panels, and drag each one down to the bottom of the screen. If more than one has been hidden down there, tapping on them will bring up a Safari-like multi-panel view, allowing you to browse through each of your messages in progress, either bringing them to the forefront by tapping on them, or tapping the “X” to get rid of them in the same way as you’d dismiss a Safari window. There appears to be no practical upper limit to how many of these you can have open, either — we were able to open about 35 in our own testing before we got bored and simply gave up, idly wondering about the sort of person who might need to have so many messages in progress on an iOS device.