Reorganise EXWM config a little

config.org

@@ -345,12 +345,18 @@ needs to be set up to install them if they aren't already.
    #+begin_src emacs-lisp
      (use-package exwm
        :config
-       (require 'exwm-randr)
-       (exwm-randr-enable)
        (require 'exwm-config)
        (exwm-config-default))
    #+end_src
 
+*** Multi-monitor
+    Multi-monitor support is provided in =exwm-randr=:
+
+    #+begin_src emacs-lisp
+      (require 'exwm-randr)
+      (exwm-randr-enable)
+    #+end_src
+
     When I have my laptop connected to a monitor I want the built-in
     display to turn off, but turn back on when it's disconnected. Turns
     out this is a total pain.