diff --git a/config.org b/config.org
index 03d4a39..a441cca 100644
--- a/config.org
+++ b/config.org
@@ -36,6 +36,19 @@ needs to be set up to install them if they aren't already.
     (scroll-bar-mode -1)
   #+end_src
 
+  It's nice to have an inverse of =C-x o= for switching between
+  windows. =other-window=, the function that =C-x o= is bound to,
+  takes an argument =COUNT= that determines how many windows it skips
+  forwards so we can simply pass -1 to =other-window= in a lambda and
+  bind to that:
+
+  #+begin_src emacs-lisp
+    (global-set-key (kbd "C-x O")
+                    (lambda ()
+                      (interactive)
+                      (other-window -1)))
+  #+end_src
+
 ** Colour Scheme
    Currently using =spacemacs-theme='s light variant, but I prefer a pure
    white background to the off-white it has by default.