This book is based on the current version of Compressor 4 (v4.0.7) "Compressor 4 - How it Works" from the GEM series (Graphically Enhanced Manuals) explains Apple's compression software "Compressor" with rich illustrations that are not found in the official manual. The 69 pages letter size book helps you to understand all the concepts and workflows in that powerful little app. What are Graphically Enhanced Manuals? They're a new type of manual with a visual approach that helps you UNDERSTAND a program, not just LEARN it. No need to read through 500 of pages of dry text explanations. Rich graphics and diagrams help you to get that "aha" effect and make it easy to comprehend difficult concepts. The Graphically Enhanced Manuals help you master a program much faster with a much deeper understanding of concepts, features and workflows in a very intuitive way that is easy to understand. What are Graphically Enhanced Manuals (GEM)? They're a new type of manual with a visual approach that helps you UNDERSTAND a program, not just LEARN it. No need to read through 500 of pages of dry text explanations. Rich graphics and diagrams help you to get that "aha" effect and make it easy to comprehend difficult concepts. The Graphically Enhanced Manuals help you master a program much faster with a much deeper understanding of concepts, features and workflows in a very intuitive way that is easy to understand.