The page https://help.libreoffice.org/24.2/en-US/text/shared/optionen/01060500.html?System=UNIX&DbPAR=CALC&HID=modules/scalc/ui/optcalculatepage/OptCalculatePage#bm_id3149095 does not explain the multithread setting. Page is Tools - Option - LibreOffice Calc - Calculate Note: while editing the Help page, it is important to reorder the contents following the dialog layout and fill whatever is missing in the settings, if any. The patch that added mutithreading can be investigated, starting from https://gerrit.libreoffice.org/c/core/+/46782/