The real question is why do you get an index without two columns. \starttext \dorecurse{26}{\convertnumber{a}{#1}\expanded{\index{\convertnumber{a}{#1}}}} \placeregister[index]%[n=3] \stoptext Hans van der Meer schrieb am 26.08.18 um 17:37:

How do I produce an index with more than one column?

This produces one column only: \startchapter[title=\mytitle{Register}] \startcolumns[n=2] \placeregister[index] \stopcolumns

Nor did \placeregister[index][n=2] or \placeindex[n=2], with or without the columns envirenment, produce the result wanted. The \startsimplecolumns[n=2] environment did produce two columns, but then played havoc with the textheight.

dr. Hans van der Meer

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