Hi, "okular" is a PDF (and other formats) reader, and I'm trying to get it to use the "right" fonts. Here is a screenshot of the "Properties" dialog, which shows which fonts are configured in the document and which font files are in use: https://drive.google.com/file/d/1w-imGIDQK2F1dd2pP2yel6vbVQEBr0vc/view?usp=drive_link The problem is that "NImbus Mono" gets used in place of "Courier New", and "Nimbus Roman" gets used instead of "Times New Roman". I have tried to edit /etc/fonts/local.conf and ~/.config/fontconfig/fonts.conf in many ways. "fc-match" does not mimic the problem that happens with "okular". Quote:<< $ fc-match TimesNewRoman FC_DEBUG= FC_DEBUG= times.ttf: "Times New Roman" "Regular" >> The system is Linux Mint 21.2. I'll post more information if needed. Regards, Albert Wik.