How to Shoot Before and After Photos That Line Up

The comparison is decided before you open any editor. If the two photos were taken from different spots, at different heights, with different light, no layout can rescue them — you end up comparing two pictures rather than one change.

This is the short version of what to do with the camera, in the order that matters.

1. Pick the spot, then mark it

Stand where the camera will be and put something down that you can find again: a strip of tape on the floor, a chair leg, a chalk mark, the edge of a tile.

The second shot has to be taken from that same spot. Not "roughly the same" — same. A 30 cm step sideways moves every vertical line in the frame, and those lines are what the eye uses to judge whether things line up.

If the floor is going to change (a renovation), mark the spot on something that survives: a door frame, a wall corner, a window.

2. Same height, same lens

Phone cameras change their field of view when you switch lenses. If the first photo was taken at 1× and the second at 0.5×, the before image covers twice the scene and the comparison is meaningless.

• Stay on the same lens for both shots.
• Keep the phone at the same height. Chest height is easy to repeat; "wherever it was" is not.
• Do not zoom with your feet between shots.

3. Same light, or accept the difference

Light is the change people notice first, even when they are looking at a renovation. Two options:

• Shoot both at the same time of day, with the same curtains and the same lamps on.
• Or shoot both with everything switched on, so the light is at least consistent.

If the light will differ, say so in the caption. "Same room, different time of day" is honest; a viewer who notices the shadow change without an explanation assumes the photo was edited.

4. Frame one thing

A comparison with four changes in it reads as "something is different" and nothing more. Decide what the image is about before the first shot:

• the whole room, or just the fireplace
• the full outfit, or just the haircut
• the product, or the label

Then frame that, and leave a little margin. Cropping in later is easy; adding frame that was never captured is impossible.

5. Take the boring extra shot

Take one wide shot and one close shot of each state. The wide one shows the context, the close one shows the detail. When you build the comparison you can pick whichever pair actually lines up.

It costs ten seconds and saves a reshoot.

6. Keep both photos at full size

Do not send the before photo through a chat app that compresses it — or if you must, keep the original somewhere. A comparison blends two images at the same scale, and a compressed, downscaled copy next to a full-resolution one is visible immediately as softness on one side.

7. Build the comparison

Once the two photos exist, the rest is arrangement: put them side by side, or overlay one on the other at low opacity to check alignment, or sweep a handle between them.

• Overlay is the fastest way to check whether the two shots really line up. If the edges snap together, the pair is good.
• Side by side is the honest layout for a report.
• Slider works when the camera did not move.

The tool fills each half edge to edge and crops rather than stretching, so matching the crop is a drag inside the frame, not a resize.

The short version

Mark the spot, keep the lens and the height, shoot both in the same light, frame one subject, keep the originals, and shoot one extra close-up. Everything after that is a layout choice.