--- a/.emacs-my	Wed Feb 09 15:20:49 2011 +0200
+++ b/.emacs-my	Sun Feb 20 21:11:26 2011 +0200
@@ -126,6 +126,11 @@
   (when (>= emacs-major-version 22) (tooltip-mode -1))
   )
 
+(when window-system
+  ;; Prefer horizontal windows splitting.
+  (setq split-height-threshold 15)
+  )
+
 (setq frame-title-format "Emacs - %b")
 
 (setq default-header-line-format nil)