Access Drafts from Mail in iOS Quickly with a Tap and Hold
Most people will tap back from their inbox to Mailboxes and then Drafts to access any email drafts on an iPhone or iPad, but rather than doing that you can quickly jump to a list of Drafts in Mail app by just tapping and holding on the Compose icon.
Doing so will present you with a list of all messages stored as drafts in the current mail account, and you can scroll down to access drafts saved far in the past. If you don’t see the message you’re looking for immediately, you can use the pull-to-refresh gesture to download the most recent ones from the mail server.
This is different from holding the Compose icon on previous versions of iOS, which jumped directly to the last saved draft instead.