The Fedora Project uses specific conventions that extend beyond the general style rules and guidelines. These conventions exist to produce specific results from the toolchains or to better address the specific requirements of the Fedora Project.
A.4.1. Screenshots and Images
Images and especially screenshots are hard to maintain, hard to translate, and have to be changed constantly with every test.
Screenshots do not give any more information than is already given with the text. The user is most often following along with the instructions, so the screen is up in front of them already.
Many people perceive that screenshots are necessary in help documents, often because they've seen other documents use screenshots. Avoid this trap. Screenshots lower the quality of the document by taking up valuable space with repetitive imagery and distracting authors from maintaining the far more valuable content.
Diagrams are different from screenshots. A diagram is a graphic that is self-descriptive and in many cases can be very useful or show things that cannot be described as well with words. In such cases it is worth the extra effort to maintain the graphic, including dealing with localization. Fortunately, most documents do not need more than one or two diagrams.
