- Launch the Mail app from the Home screen of your iPad.
- In the top right hand corner, hold down (do not tap) the Compose button.
- Instead of launching a brand new email, your iPad will bring up all the drafts you have previously saved, regardless what account they were created from.
- Simply tap on the draft you’d like to finish writing and you can fire away the email as soon as you’re done. That’s all there is to it.
Here is the article. It shows the iPhone, but the iPad operates the same way: Click Here
Thanks to iMore.com