I'm new to the DX and to Android, and either I'm missing something fundamental or the multitasking aspect is not as robust as I'd expected. Today, I was replying to an email, and realized I wanted to get a phone number into the reply text. I didn't have the number handy, except in Contacts. So I backed out of the reply to go into Contacts and select the number - ie. put it on the clipboard. But when I touched the email icon again, the reply I'd been working on was gone.
I've since found how you can long press the (hard) home key and switch between recent apps, and there's an icon called "message" which brings you back to the last open email. But if you'd been working on a reply before you left it, that reply is gone!
How do you switch between apps so that each is in the precise state you left it? Not possible?
The DX is stock - unrooted - with latest update.