-notes: Changing this setting will NOT work if you use a terminal to run emacs. Font 
        rendering is handled by the X window. 
-where: '~/.spacemacs' @ 'user-init()' 
-howto: Example below, note that 'default' means unique, otherwise one will override. 

        ex."
        (setq-default dotspacemacs-default-font '(
                                                  :size 10.0
                                                  :weight normal
                                                  ...)
           )
        "
        
        The properties, like ':size', can be found at the following links: 
         'https://develop.spacemacs.org/doc/DOCUMENTATION.html#font' 
        'https://www.gnu.org/software/emacs/manual/html_node/elisp/Low_002dLevel-Font.html'