It is probably my lack of brain cells, but I do not understand chapter 2 of the ConTeXt manual at all. Suppose I have a manual-like document and I want to produce different PDF-files out of it: 1. The book 2. The book in another layout 3. The book in screen format with navigation 4. A simple presentation with bullet points, one or more pages per chapter As I understand it I will need 4 environments: .../foo/bookenv.tex .../foo/book2env.tex .../foo/bookscreenenv.tex .../foo/presentation.tex and I can put each chapter in a component file, i.e. chapter1.tex, chapter2.tex etc. .../foo/chapter1.tex .../foo/chapter2.tex But here my understanding stops. - Should I create a project file for each of the 4 modes above? And put these in different subdirectories as in: .../foo/book/book.tex .../foo/book2/book2.tex etc.? Or do I use multiple environments in one project and I can get 4 PDF's as a result? Or are these multiple products (I would guess this, but how then to set it up)? Should my chapter files contain \startcomponent \stopcomponent and does that mean they are independently compilable? I have been reading and re-reading this, but the relation between project, environment, component and product keeps escaping me. Is there a good example somewhere?