Hi together, this is not really a practical request, but an interesting (I think) idea... ConTeXt can do simple imposition (arranging pages on sheets, see \setuparranging), but in professional imposition you need to compensate for the paper thickness in folds to keep pages readable - you can move the outer pages of a fold out of the gutter (spine), or move the inner pages to the spine. (This is called creep in English, Bundversatz in German.) That means, your outer margin will have different width, depending on the position of the page in its fold. See e.g. https://helpx.adobe.com/indesign/using/printing-booklets.html A guy on the LilyPond mailing list had the interesting idea to adapt the line width to this creep, to keep an even outer margin - it would mean that TeX needs to know about imposition while breaking lines. What do you think? Greetlings, Hraban --- http://www.fiee.net http://wiki.contextgarden.net GPG Key ID 1C9B22FD