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Hi, To place the index at the end of the book, I put \placeindex before \stopproduct. It is compiled well. But, for the better output, I have two questions about the index. 1. In the output, it distinguished uppercase and lowercase initial. For example, S Squeeze theorem s set simple statements … Is there a way to make index combining the lowercase and the uppercase together as follows? s set simple statements … Squeeze theorem 2. The index shows the English letters first and the Koren letters follows. Although it is OK that English words are shown first, is there a way to make Korean words are shown first since the main language is Korean? Since I just use “\placeindex”, I don’t give a Minimal sample. Thank you. Best regards, Dalyoung