Font dropdown box in Writer [closed]

edit

That list is stored in a configuration file in your $HOME directory; for me the location is /home/jk/.config/libreoffice/4/user/config/fontnameboxmruentries and for you it should be the same, except that "jk" should be replaced by your login name on the system. The file is a regular text file and can be edited by any text editor; do not use LO itself to do the editing, however!