Hello, I have a *project* that consists of a book in 3 volumes. Each volume is a *part*. Each volume or part has a (recto-verso) title page. Each volume or part also has front and back matter: table of contents, bibliography, index, ... Each volume or part also has *appendices* Thus, I have 3 *products* corresponding to the three volumes. Each product has *components*: chapters, appendices, ... Now, I would like the second volume to know that it is Part II and the third volume to know that it is Part III. I would also like to continue the chapter numbering in succession in each volume: i.e. 1, 2, 3 in Part I; 4, 5, 6 in Part II; 7, 8, 9 in Part III. Furthermore, I would like the appendices to do likewise: i.e. A, B in Part I; C, D, and E in Part II; F in Part III. Of course, I need to specify in my *environment* \definestructureresetset [default] [0,0] [1] \setuphead [part] [sectionresetset=default,conversion=Romannumerals] But... how do I propagate the numbering from product to product, that is part to part? Everything was just fine when all of the parts were collected into a single product having a unique front and back matter and all of the appendices at the end... It should be simple, but sometimes I fail to see the obvious! :) Alan