hello Holger, > box width w height margin with .nw at last box .nw dashed > label_for(layer) at last box.c
I really don't know why but yes: it works. Now i have a workaround in my hand. On the other hand: the more i saw the Tadziu's code, the more I like it for its clean separation between porcelain and plumbing. The only thing you have to read is: layer("Entête Ethernet") layer("Entête IP") layer("Entête TCP") layer("Donnees applicatives") Thanks marc