Minimize Compose Window in Apple Mail for IOS Using Gesture
Sometimes, when you’re composing a new email, you need to look back at your inbox to gather more information. OS X Daily points out that instead of throwing this email into drafts and closing it, you can minimize the compose window in the Apple Mail app.
All you have to do is touch the top of the compose email window and drag it to the bottom of the screen. Your mailbox is now fully accessible to you, so you can double-check any other information you need.
How to Reduce the Number of Emails in an iPhone Mail Application | OS X Daily