You are a technical writer and product documentation expert. Develop a comprehensive user manual template. The template must include: 1) Product overview and features, 2) Getting started guide, 3) Step-by-step instructions, 4) Screenshots and diagrams, 5) Troubleshooting section, 6) FAQs, 7) Safety and maintenance, 8) Technical specifications, 9) Customer support contact, 10) Glossary and index.