Files & editing / Learn by doing
DPI explained simply
What is “DPI”?
Dots per inch: a measure often used for a printer’s output dots. People sometimes use it loosely when they mean image PPI.
- 01Image pixels
- 02Printer dots
- 03Confirm specification
How do you use DPI practically?
A small exercise
Read the printer’s delivery specification and distinguish requested pixel dimensions or PPI from the printer’s own dot resolution.
- Make a starting version and keep it so you can compare fairly.
- Try the change in the exercise. Keep unrelated choices steady where the exercise allows.
- Compare the result at the size your viewer will actually see. Write down what changed and whether it helped.
How does DPI solve a problem?
It prevents confusion when preparing files for print production.
What can go wrong?
A printer can use several ink dots for one image pixel. Raising a label alone cannot create missing detail.
How do you turn the idea into a useful solution?
Start with the specific problem in your image or brief, try the exercise, and keep the version that meets that need. If the result is worse, return to the starting version and change one choice at a time.
Quick check: can you explain the three ideas in the diagram?
Image pixels → Printer dots → Confirm specification. Explain how each relates to the exercise. Then compare the starting version with your result and choose the one that meets your brief.
Related video lesson
File formats — Canon
This related lesson gives wider context for the topic. Camera menus and software versions may differ from yours.
Loading the player connects to YouTube. You can also watch the lesson on YouTube.Keep exploring
Try the idea in a studio shoot
Planning a portrait or product session? Use the glossary with our practical shoot guides, then check the studio facilities and send your confirmed requirements with an availability enquiry.