Glance at the summary firstThe summary from the end of the lesson, as a road map before you start reading.
Cropping is a second chance for a composition that didn't quite come together at the shoot: it throws out what is extra at the edges, enlarges the subject and lets you place it again. The aspect ratio lock fits the photo to where it will go, straightening fixes the horizon and perspective correction fixes leaning buildings. The limit of cropping is set by resolution and by grain that grows in the shadows; the limit of honesty is drawn by leaving no one half-cut at the edge and not changing the meaning of the scene.
Learning goal
You will be able to use cropping as a second chance for a composition that didn't quite come together at the shoot. You will strengthen the subject by throwing out what is extra at the edges, choose with the aspect ratio lock a rectangle suited to where the photo will go, straighten the horizon with the straighten tool and leaning buildings with perspective correction, weigh how much you can crop against resolution, and make an honest crop that leaves no one half-cut at the edge and doesn't change the meaning of the scene.
The question
You look at a photo, and something seems not missing but extra. The subject is there, but to reach it your eye first has to pass through an arm at the edge, a bright window, half a chair. The horizon leans slightly too. You think about deleting the photo; it was a good moment, but it somehow never became a good photo.
How does a single crop rescue a photo? To crop is to redraw the edges of the frame after shooting. A better photo is often hidden inside a photo, and the only thing you need to do to reveal it is throw out what is extra. In this lesson we will talk about how to crop, how to straighten the horizon and leaning lines, and where you should stop.
Context
In Module 6 you learned to build composition at the moment of shooting: choosing the frame, placing the hero, cleaning up the background, keeping the horizon level. We always said your feet are stronger than cropping, because you can't add afterward something that stayed outside during the shoot. That is still true. But in real life moments pass fast; while a birthday cake is being blown out, there is no time to build the frame perfectly.
The first step of editing is cropping, because when the frame changes, the decisions about the photo's light and color change too. A bright window thrown out at the edge no longer misleads you while you set the overall brightness of the photo. The crop tool does the same job in almost every editor: by dragging the edges or holding a corner, it shrinks the frame, rotates the photo and fixes the ratio. In this lesson we talk not about where the buttons are, but about when and why these jobs are done.
Simple explanation
How does cropping strengthen the subject?
Before you start cropping, build the sentence from Lesson 6.2: "This photo is about …" Then look inward from the edges and search for everything that doesn't serve this sentence: an arm entering at the edge, a window glaring in a corner, a stranger half visible, a wide empty floor around the subject. A crop throws out these extras; the subject grows in the frame and the gaze gathers on it.
While cropping you also have a chance to place the subject again. In most apps a nine-box grid appears over the crop tool. You can shift the subject to a crossing point, open space in the direction of the gaze, or put a symmetrical scene right in the middle. Watch where the edge runs too: an edge that cuts a person at the wrists, knees or right under the chin looks odd; moving the edge a little above or below the joint shows the person whole. Cropping is also simplifying: the less that stays, the more strongly what stays speaks.
What is the aspect ratio lock for?
The crop tool usually leaves the ratio free; you can drag the edges as you like. But if you know where the photo will go, fixing the ratio makes your job easier. This is called the aspect ratio lock. For frames to be viewed full screen on a phone you choose a vertical ratio, for a print frame the ratio of that frame, and for a series the same ratio in every frame. When the ratio is locked, the shape of the rectangle doesn't change as you drag the edges.
Cropping a series of photos to the same ratio makes them a tidy whole when you put them side by side. In a portfolio, some frames being long and horizontal, some close to square and some narrow and vertical tires the viewer's eye. Think of the six photos you will put in your portfolio at the end of this module: keeping all of them in the same ratio, or in two ratios at most, makes the selection look more organized. Still, if a photo clearly fits better in a square or a longer rectangle, you don't need to force it for the sake of order.
How do you straighten the horizon and leaning lines?
The crop tool usually also has a straighten slider. You turn the slider little by little and match the horizon to the horizontal line of the grid. Straightening, as Lesson 6.6 warned, leaves gaps at the corners, and the app closes them by cropping; that is why you should think of straightening together with cropping. If the horizon can't be seen, match a vertical edge, for example a door frame, to the vertical line of the grid.
Some apps also offer a perspective correction tool. The edges of a facade you photographed by tilting the phone upward narrow toward the top and give the impression that the building is leaning backward. Perspective correction tilts the photo on its horizontal or vertical axis to make these edges parallel again. This tool also takes area from the edges and can change the building's proportions a little; you need to avoid pushing it so far that the building looks taller or squatter than it is. A light correction is usually enough, and the feeling of leaning disappears while the building looks natural.
How much can you crop, and where do you stop?
Every crop reduces the pixels. In Lesson 3.4 you saw how to work out the cropping margin and how big a photo can be printed. A photo that will be seen on a phone screen can be cropped quite a lot; for a photo going to a big print, the limit of cropping is closer. When you enlarge a very small part, detail is lost, edges soften and grain in the shadows becomes noticeable. In a portrait taken in dim light, this grain shows up as colored blotches in the part of the face left in shadow; the same breakdown appears on the shaded cheek of a dark-skinned face or under the chin of a light-skinned face. After a hard crop, zoom in on the face and check.
Cropping also has a limit to do with honesty. Leaving someone half-cut at the edge of a group photo, or taking them out of the frame, can read like deleting that person from the photo; while cropping, look at whether everyone stays whole. Context left outside the frame can change the meaning of a photo. In a photo documenting an event, a crop that turns the meaning of the scene upside down has the same result as deleting something. An honest crop keeps everyone whole and keeps the meaning of the scene.
Visual evidence
Imagine quickly photographing a seven-year-old child blowing out the candles on their birthday cake. In the saved frame the table leans slightly to the left. An adult's arm and plate have entered the frame from the right edge, a sunny window glares bright white in the upper left corner, and the wide, empty tablecloth along the bottom edge covers a third of the frame. The child's face and the candles are in the middle of the frame, but small.
You open the crop tool and first rotate the photo three degrees; the edge of the table straightens. Then you lock the ratio to a vertical four to five and pull the edges in. The window, the arm and the empty tablecloth leave the frame. The child's face settles on the upper right crossing point; puffed-out cheeks, closed eyes and the seven flickering flames in front of them fill the frame. After cropping you zoom in on the face and look; the grain on the shaded cheek isn't noticeable, and the detail is enough. The same moment, the same cake; the photo now tells only of that breath.
Common mistakes
Common mistakeMaking cropping the excuse for carelessness at the shoot.
Cropping can't bring back what stayed outside, and every cut eats into resolution. The fix: build the frame at the shoot, and use cropping as a second chance.
Common mistakeRunning the edge through joints or under the chin while cropping.
The person looks cut off. The fix: move the edge away from the joints and the chin line.
Common mistakeCropping a series of photos each to a different ratio.
Put side by side, the selection looks scattered. The fix: use the aspect ratio lock and stay with one or two ratios in a series.
Summary
Cropping is a second chance for a composition that didn't quite come together at the shoot: it throws out what is extra at the edges, enlarges the subject and lets you place it again. The aspect ratio lock fits the photo to where it will go, straightening fixes the horizon and perspective correction fixes leaning buildings. The limit of cropping is set by resolution and by grain that grows in the shadows; the limit of honesty is drawn by leaving no one half-cut at the edge and not changing the meaning of the scene.
Mini assignment
The ten photos you set aside in the previous lesson are this lesson's working material.
- For each of the ten photos, write the sentence "This photo is about …" and note the extras at the edges that don't serve this sentence.
- Crop each photo so as to throw out the extras and strengthen the subject; if needed, shift the subject to a crossing point.
- Straighten the ones with a tilted horizon by rotating them; in those with buildings, try the perspective correction tool lightly.
- Lock them all to one or two ratios, put them side by side, and zoom in on the hard-cropped ones to check the detail in faces and shadows.
Check yourself
- In every cropped photo, is the subject bigger and clearer than before the crop?
- Do the edges cut a person at the joints or under the chin?
- In the group photos, did everyone stay whole?
Glossary
| Term | Short definition |
|---|---|
| Crop | Redrawing the frame after shooting by pulling its edges inward. |
| Aspect ratio lock | The setting that keeps the ratio of the rectangle fixed while cropping. |
| Straighten | Turning the photo a few degrees to straighten the horizon or vertical lines. |
| Perspective correction | The tool that makes the converging edges of a building photographed from below parallel again. |
| Honest crop | A crop that leaves no one half-cut at the edge and doesn't change the meaning of the scene. |
Mini quiz
1. What question should be asked before starting to crop?
- A) How many megapixels is the photo?
- B) What is this photo about?
- C) Which filter will be applied?
- D) When was the photo taken?
2. Why is the aspect ratio lock useful when cropping the photos in a portfolio?
- A) It makes the photos brighter
- B) It reduces grain
- C) It makes the selection look tidy side by side
- D) It straightens the horizon automatically
3. With which tool do you fix a building photographed from below that looks as if it is falling backward?
- A) Perspective correction
- B) Color temperature
- C) Contrast
- D) Aspect ratio lock
4. When a portrait taken in dim light is cropped hard, what should you check on the face?
- A) The color of the background
- B) The photo's file name
- C) Where the horizon is
- D) Grain that grows in the shaded areas of the face, and lost detail
Answers
- B — Cropping is throwing out edges that don't serve what the photo tells; building this sentence first shows what has to go.
- C — Photos cropped to the same ratio form a whole when put side by side; different ratios make the selection look scattered.
- A — Perspective correction tilts the photo on its axis and makes the converging edges parallel again.
- D — Cropping reduces pixels; in dim light the grain in the shaded part of the face shows up as colored blotches when enlarged.
Summary card
- Cropping is a second chance; throw out the extra, let the subject grow.
- First build the sentence: "This photo is about …"
- Lock the ratio for where the photo will go; stay with one or two ratios in a series.
- Straighten the horizon by rotating, buildings with perspective correction.
- If you cropped hard, zoom in on the face and check; leave no one half-cut.
Bridge to the next lesson
Your frame is now tidy. The second step of the workflow is light: a photo left too dark at the shoot can often be rescued. But which slider you start with changes the result. The next lesson shows how to rescue a dark photo, and why touching brightness first, then contrast, and finally shadows and highlights works.