Design for black-and-white printing

Colour figures in journal articles are common these days. Many of the people reading them, however, will print them in black and white. Consequently, when designing figures, we should ensure they remain meaningful if converted to grayscale. Here are a few tips to keep in mind.

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Know your image file formats

Images come in a variety of file types: jpg, png, pdf, eps, svg, tif, bmp, and countless other lesser-known ones. Each have their pros and cons, but they can be divided into two types: vector and raster. In science, we generally want vector images, unless we are dealing with photos.

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Figure captions need not be half a page

Before leaving high school, every scientist should have learned  all the things a graph should contain: a descriptive title, labels for every axis, appropriately spaced tick marks, and a legend if necessary. All pretty straightforward, so you would think any figure published in a scientific journal would adhere to this as a minimum. But I’ve come across far too many figures breaking one or more of these rules. The problem is not that people are excluding the information, rather they are putting everything in the figure caption. Consequently, the figure caption ends up being long-winded, procedural, and not at all interesting. Fortunately, it is easy to make the caption succinct and descriptive with a few quick adjustments to the figure.

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