The writer's task is to find it. Command-driven systems are used to perform or control an activity, such as word processing, programming, or data control. Several basic rules apply to producing a useful, usable, and readable manual. Most users don't look for information about problems under the cause, they look under the results. The hardest part of the writing task is being able to use very few words, keeping it as interesting and light as possible without being cute and soppy, and of course, covering the subject completely.
Section Headings Good headings are vital for usability.
They should accurately reflect the contents, and they should be succinct. They are memos. Document Glossary Users must be able to understand all words used in the manual for it to be useful. If there are strange words in the system, but these are used only once, they should be explained when they are used. Even profession-specific terms can be a problem.