A good user manual isn’t just a list of instructions — it’s the bridge between development engineers and the user in the field. At Galil Technical Writing we’ve built hundreds of manuals for complex high-tech products, and we’ve learned that 5 principles separate a manual that sits in a drawer from a manual that actually works.
1. Write for the user, not the engineer
The first question before you start writing: who is reading this? A field technician? An integration developer? A non-technical end user? Each audience needs different language, a different level of detail, and a different information order. A single manual “for everyone” is a manual for no one.
2. A picture is worth a thousand words — when it’s labeled right
A diagram of a complex system without numbered callouts is an incomplete diagram. Every component must be tied — by number or color — to the text that explains it. In our work with ZEISS on quality-control systems in the semiconductor industry, training time dropped by 30% every time we replaced two paragraphs of explanation with a single labeled diagram.
3. Steps — not paragraphs
When a user tries to perform an action, they don’t read — they scan. Step 1, Step 2, Step 3. Not “first,” “then,” and “additionally.” Every action should start with an imperative verb (“Press,” “Open,” “Connect”) and include the expected result (“The screen will display…”).
4. Fire test: have strangers follow the instructions
A manual that hasn’t been tested on a real user hasn’t been tested. Hand the draft to someone who wasn’t involved in writing it — ideally someone similar to the target audience — and ask them to follow the instructions without questions. Every place they get stuck is a place where the manual isn’t clear enough.
5. Updates aren’t a bonus — they’re mandatory
Products change. UI screens get redesigned, hardware ports get replaced, safety procedures get updated. A manual that hasn’t been updated in two years is a negative asset — it creates frustrated users and loads up support. Build a systematic update process, and maintain versions.
Bottom line
Quality technical documentation is an investment that pays back: fewer support tickets, shorter training, and a product that feels mature and professional. At Galil Technical Writing we specialize in exactly this — turning engineering complexity into a document that a user closes in 5 minutes feeling successful.
Want to talk about your project? Leave your details and we’ll get back to you.