How do I preserve the camera settings on my iPhone?

iPhone users running iOS 10.2 or later can now preserve the last camera mode, photo filter or Live Photo setting they used. To access the Preserve Settings sliders in iOS 10.2 or later, navigate to Settings >Photos & Camera (Just Camera after iOS 11), then tap the Preserve Settings option under the Camera section. From here you can enable or disable 3 sliders: Camera Mode, Photo Filter, Live Photo.