It's quite obvious. Just tried it myself [1]. You first select an identity to use to auto-fill. When doing that, it will tell you the data it will insert in th

It's quite obvious. Just tried it myself [1]. You first select an identity to use to auto-fill. When doing that, it will tell you the data it will insert in the subtitle. You can also click customize and choose what data to place into each field. [1] - http://imgur.com/a/HL59q http://imgur.com/a/HL59q