How do I put a picture on top of another picture on my iPhone?
Scroll down and tap Double Exposure. Tap the photo icon at the bottom of the screen to choose a photo to superimpose. Choose a second photo that will appear over top of the first. You will now be able to move the second photo around by dragging it with your finger.
Can I overlay Photos on iPhone?
Tap the tag icons in the menu along the bottom of your screen to be able to change how the two photos interact with each other. You can use the default settings or use Lighten, Darken, Add, Subtract, or Overlay. Tap the drop to change the opacity of the second image overlaying the first.