use ace-window when window more than 3

lisp/init-ace-window.el

@@ -5,7 +5,8 @@
 
 (with-eval-after-load 'ace-window
   (require 'ace-window-posframe)
-  (ace-window-posframe-mode 1))
+  (ace-window-posframe-mode 1)
+  (setq aw-dispatch-when-more-than 3))
 
 (lazy-load-global-keys
  '(("C-x o" . ace-window))