Hi, During HTML export, whatever is the value of org-use-sub-superscripts, the undescore in the middle of a word is alway interpreted as subscript. Example: _F_irst _L_evel In this case, if org-use-sub-superscripts has the value {} or nil, I would expect to see the first letter of both words to be underlined. However, the rest of each word is displayed as a subscript and the leading _ character is displayed. Is this variable for latex only? Software Version: GNU Emacs 25.1.1 (x86_64-unknown-cygwin) of 2016-09-17 Org mode version 9.0.4 (9.0.4-dist @ /cygdrive/c/Users/re/.emacs.d/site-lisp/org-9.0.4/lisp/) Regards,