If i run C-x 3, when emacs starts up it will split window and creates two windows of equal size like this enter image description here

Now i run C-x 3 again it will split current window into two parts resulting in this

enter image description here

But whenver i create a vertical split, i want to auto adjust width of each window to equal size like this.

enter image description here How can i achieve this?

  • 2
    You can press "C-x +" after splitting to make all windows evenly spaced. Handy to have in your muscle memory.
    – InHarmsWay
    Commented Sep 21, 2015 at 12:59
  • @InHarmsWay is there a hook which will run after creating window? Commented Sep 21, 2015 at 13:02
  • That I'm not sure, but you could always define your own command that calls the two functions you need. Logically the same as a hook, and allows you to continue calling the original functions separately if desired.
    – InHarmsWay
    Commented Sep 21, 2015 at 13:05
  • @InHarmsWay thats fine, post it as answer? Commented Sep 21, 2015 at 13:08
  • 1
    Try the window-configuration-change-hook. However you may want to bind your own split commands for this instead as @InHarmsWay suggested. Using the hook would likely have side effects you don't want with commands that split windows for other purposes.
    – glucas
    Commented Sep 21, 2015 at 13:08

1 Answer 1


You can define your own command for this. This allows you to use it when desired, but not change the default behavior of the original commands, keeping them useful individually if desired:

  (defun my/split-window-evenly ()

(global-set-key "\C-cb" 'my/split-window-evenly)

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