ediff-split-window-function horizontal==vertical?

Question

Emacs 23.1.1 Ediff 2.81.2 on CentOs 6

Prior to any customization, Ediff would, by default, split the windows horizontally (one on top of the other).

I wante

Answer 1

While it doesn't quite answer your problem, you could also use a function to specify whether to split vertically or horizontally depending on window dimensions:

(setq ediff-split-window-function 'split-window-sensibly)

split-window-sensibly is built-in.