iOS’s Photo Shuffle wallpaper does a great job of identifying attractive photos for your Lock Screen. However, if you’re like us, you’ll sometimes wonder when or where you took a Lock Screen photo. Here’s how to figure that out. Touch and hold the Lock Screen when it’s displaying the photo in question, tap Customize, tap the Lock Screen wallpaper, tap the ••• button in the lower-right corner, and tap Show Photo in Library. Then you can swipe up to reveal more information about the photo, swipe left and right to see the photos on either side, or pinch to see it in the context of your entire photo library.