Questions
Frequently asked questions
Answers to what we're asked most often — about the reference itself and about everyday work with pictures: from an email with an attachment that won't go through to a poster that looks nothing like it did on screen once it's on paper.
It's easier to save a picture correctly the first time than to explain later why it looks the way it does.
About the reference
Is this the same site that used to be here?
No. A different site used to run on this domain, and later unrelated spam pages appeared. Those pages are gone, we won't restore them, and we aren't responsible for them. Only the name remains.
Can I get pictures here?
This reference explains how to prepare images; it doesn't hand them out. Hosting other people's pictures means making decisions about other people's rights, and that isn't our job.
Why don't you name any programs?
Interfaces and names change, but the principles of working with images stay the same. Besides, there's no reason for a reference to turn into a ranking or a storefront: we don't sell anything and don't recommend specific products.
What is the advice based on?
On the general principles in documentation for graphics formats and editors, and on editorial experience. We don't publish made-up tests, measurements or stories.
Sizes and formats
What size does a picture on a slide need to be?
Go by how much of the slide it will take up. A full-slide picture needs a size comparable to the resolution of the screen it will be shown on, while a small icon needs far less. Anything bigger than necessary is just extra weight in the presentation file.
Can I turn a small picture into a big one?
You can enlarge it, but it won't gain any detail: the editor only stretches the existing pixels and smooths the edges. For a noticeable enlargement, look for a larger original or a vector version.
Why use SVG if there's PNG?
SVG stores vector graphics, so a logo or icon stays sharp on any screen and at any page zoom level. PNG is good for raster pictures with transparency, but it loses crispness when enlarged.
Should I send photos as PDF?
If it's a document that will be printed or read page by page, yes, PDF is convenient. For a single photo in an email, JPEG is usually simpler and lighter.
Printing and rights
Why is 300 dots per inch recommended for print?
It's a common guideline at which a print viewed up close looks sharp. Large posters seen from a distance can get away with less; it's best to confirm the exact requirements with whoever is doing the printing.
Do I need to convert the file to CMYK myself?
It depends on where you're printing. A home printer usually converts RGB to its own inks, while a print shop may ask for a CMYK file. Ask ahead of time so you don't have to redo the layout at the last minute.
If I edited someone else's picture, is it mine now?
No. Cropping, a filter or a caption doesn't cancel the original author's rights, and what you can do with it still depends on the license. We don't give legal advice — in disputed cases, talk to a lawyer.
So where should I get pictures?
The best source is your own photos and drawings. If you need someone else's work, get it from a place where the terms of use are spelled out, and keep the author and license details together with the file.
Read next
- Guides
Step-by-step guides: crop, shrink and compress a picture and get it ready for an email, a slide or print. The article catalog lives here too.
- Comparisons
Raster vs vector, JPEG, PNG, SVG and PDF, screen vs print: tables that help you pick the right format and size for the job.
- If it looks off
What to do when a picture turns blurry or jagged, gets too heavy, loses its transparent background or looks dull on paper.
- Rights & risks
Other people's rights to images, restrictive licenses, bystanders and license plates in the frame, hidden file data and fake download buttons.
- Glossary
Key terms: pixel, resolution, dots per inch, raster, vector, Bézier curve, compression, transparency and alt text.
Sources
- Documentation for graphics formats and editors (general principles)
- Clipday editorial materials
This advice is written in general terms as of the date it was prepared. Menu items, save dialogs and export settings are named differently from one editor to the next and change with updates, so check the help for the program you actually use rather than matching our wording exactly.