fredbloggs73 Sorry for a late reply.
~/.config/fontconfig/fonts.conf file may or may not exist. FIrst, check whether it exists or not. Run in terminal:
ls -lh ~/.config/fontconfig/fonts.conf
If the file doesn't exist, the command won't return anything (no output). Otherwise, it will display the full path to the file.
If the file doesn't exist, don't create it. It means that it doesn't needed by any installed software. Forget about the first tweak.
Otherwise, if the file exista, you may follow the advice by @davidjharder above and use
nano to edit
~/.config/fontconfig/fonts.conf in terminal.
micro ia another terminal based text editor, powerfull and comfortable to use. It is very... human-friendly.
micro may be used everywhere in place of
nano. To install
sudo eopkg install micro
To edit the file in terminal:
Finally, why use terminal editors to modify a text file? Use
kate, the excellent Kde text editor.
kate support traditional
Ctrl+C and Ctrl+V` shortcuts to copy-paste a piece of text.
Independently from all said above, fonts cache may be rebuilt at any time by running one command in terminal:
The command doesn't hurt anything, only improves overall fonts rendering. It's a "must run", when new font(s) were added to the system.