No matter which type of product you’re documenting and no matter whether an image illustrates a concept or shows hardware or software: Many principles apply to all images alike.
Essentially, it’s all about making your images plain and simple. Users appreciate clear images. The facts are usually complicated enough.
Also, it’s important that your images are designed and structured consistently throughout the entire documentation. This adds even another layer of simplicity because once users get used to the basic design they can fully concentrate on the content in all subsequent images.
With images, follow these basic rules:
Use each image for a clear purpose
Page layout of pages with images
Balance the visual weight of images with headings
When to add borders around images?
Indicate the size and context of the subject
Use text callouts or a legend for labeling?
Tips on formatting callouts and legends
Tips on formatting image texts in general
You rarely need figure numbers
Think ahead about editing an image
Think ahead about reusing an image
Think ahead about translating the texts in an image
Tips for developing graphics on your own
Tips for working with graphic artists and photographers
Also note the general rules of visualization, which apply as well. See:
Common basics of visualization
For more specific information on particular image types, see:
