I love the idea behind the Live Photos feature baked into new iOS devices because it lets me capture short videos of my son doing something cute. But when it comes to snapping a photo of an expense receipt or a particularly attractive pot of butter chicken I’ve cooked, it’s hard to justify the extra storage space a Live Photo consumes for the few seconds of extra video. Thankfully, iOS 11 introduced new features to help make it worthwhile to leave Live Photos on.
Apple advertised one such feature heavily in the WWDC keynote. Swipe up on a Live Photo and you see different effects you can apply to it: Live (the default), Loop, Bounce, and Long Exposure. Jeff Carlson wrote about the last one in “Using Long Exposure in iOS 11’s Photos App” (12 October 2017). Long Exposure and the others are neat, but Apple didn’t do much to tell people about what may be the most useful Live Photo feature of iOS 11: choosing a new key photo, which is the still image you see of a Live Photo in the Photos app.
If you tend to take pictures of fast-moving subjects, you have undoubtedly run into this problem: you line up a perfect shot, but before you can press the shutter button, your subject moves. That may result in a blurry photo or one that misses the moment you wanted.
But here’s the thing! In iOS 11, with Live Photos enabled, the Camera app actually captures 1.5 seconds of video before you press the shutter button. So when you choose a new key photo, it’s like editing your photo with a highly precise time machine that can show you every moment of the second and a half before the photo was taken. Here’s how you do it in Photos for iOS, but it works exactly the same in Photos for Mac:
Choose a Live Photo in the Photos app and tap Edit in the upper-right corner.
At the bottom of the screen, you’ll see a strip of images that Apple calls the frame viewer.
On the frame viewer, you’ll see a white square that indicates the current key photo. Drag that square to move through the frames of the Live Photo until you find a better one. It’s best to do this slowly.
When you let go of the square, a Make Key Photo popover appears. Tap that to change the key photo to the frame that you’ve selected.
Photos marks both the original key photo and the selected frame with a dot. If you have a 3D Touch-capable device, you’ll feel a tap when you select one of those dotted images. If you tap Done to finish editing and decide you don’t like the key photo you’ve chosen, you can always go back in and pick another one or tap Revert to undo all edits to that image.
Don’t set your expectations too high. The alternative key photos may not be perfect either, but you can often make a dramatic improvement and rescue an otherwise terrible photo!
For more helpful iOS tips, check out my book, “Take Control of iOS 11.” Thanks for making it my best-selling book yet!