Am 24.07.25 um 17:09 schrieb Ursula Hermann:
Many thanks for your answer. Should the thumb index be in the body text? Or be a margin text?
While I don’t really understand your question: – A thumb index usually depends on the part or chapter (here it’s the part, obviously) and stays the same within that section. – Its setup should probably be triggered by \setuphead or maybe \setupheader, but there’s nothing ready-made and there are several approaches possible. – The colored area must “bleed” over the edge of the paper (usually 2–3 mm), i.e. you must use the second parameter of \setuppaper for the sheet size. – It makes sense to use a layer for placement and a \framed for the box, i.e. \setlayerframed. – It makes sense to use the "edge" area for the placement of a thumb index, but if you use a layer, you can also place the box freely on a full-page layer. Hraban