*** Global Font Lock mode
Font Lock mode can be turned on globally, in buffers that support it, by the
new command global-font-lock-mode. You can use the new variable
font-lock-global-modes to control which modes have Font Lock mode automagically
turned on. By default, this variable is set so that Font Lock mode is turned
on globally where the buffer mode supports it.
For example, to automagically turn on Font Lock mode where supported, put:
(global-font-lock-mode t)
in your ~/.emacs.