The document is a presentation about visual thinking and problem solving using diagrams on napkins. It discusses creating simple visual representations to explore problems and ideas. It presents exercises where attendees draw diagrams to represent different scenarios and challenges. It also introduces several frameworks for using different visual formats like portraits, charts, maps and timelines to represent different types of problems involving factors like who, what, how many, where, when, and why. The overall message is that visual diagrams can help explore problems from different perspectives and aid in creative thinking and problem solving.