iPhone Duo: Give Your Camera Subject a Picture Preview

How to Use Duo Preview Unfold your iPhone Duo so you're looking at the inner display.

Open the Camera app. Tap the Outer Display Options button (it looks like a column view icon) in the top-left corner, then tap Duo Preview. Point the rear cameras at your subject, and they'll see a mirrored live preview of the frame on the outer display so they can adjust before you shoot.

Tap the shutter button to take a photo or Record to shoot video. You can also press either volume button or click the Camera Control.