-If ARG positive, turn hi-lock on. Issuing a hi-lock command will also
-turn hi-lock on. To turn hi-lock on in all buffers use
-`global-hi-lock-mode' or in your .emacs file (global-hi-lock-mode 1).
-When hi-lock is turned on, a \"Regexp Highlighting\" submenu is added
-to the \"Edit\" menu. The commands in the submenu, which can be
-called interactively, are:
+Hi Lock mode is automatically enabled when you invoke any of the
+highlighting commands listed below, such as \\[highlight-regexp].
+To enable Hi Lock mode in all buffers, use `global-hi-lock-mode'
+or add (global-hi-lock-mode 1) to your init file.
+
+In buffers where Font Lock mode is enabled, patterns are
+highlighted using font lock. In buffers where Font Lock mode is
+disabled, patterns are applied using overlays; in this case, the
+highlighting will not be updated as you type.
+
+When Hi Lock mode is enabled, a \"Regexp Highlighting\" submenu
+is added to the \"Edit\" menu. The commands in the submenu,
+which can be called interactively, are: