Your (a) case was what I was looking for (as I still want to be able to
split other windows vertically) and setting split-width-threshold to nil
worked great.  Thanks.

Andy

On Tue, Aug 11, 2009 at 1:42 PM, Tassilo Horn <tassilo@member.fsf.org>wrote:

> Andrew Goodnough <agoodno@gmail.com> writes:
>
> Hi Andrew,
>
> > I'd like the Buffer List to always appear as a horizontal window at
> > the bottom.  But when I have emacs maximized and show the Buffer List,
> > it appears in a new window, split vertically on the right side.  I
> > think emacs is trying to be smart about where I've got the most screen
> > real estate at the moment but I wish it would always go on the bottom.
> > Is there a variable to set this by chance?
>
> Is that (a) special for the buffer list, or (b) do you want emacs never
> to split vertically?
>
> In case (b), add
>
>    (setq split-width-threshold nil)
>
> to your ~/.emacs.  In case (b), you can use an advice around
> buffer-list.
>
>    (defadvice list-buffers (around forbid-horizontal-split activate)
>      (let ((split-width-threshold nil))
>        ad-do-it))
>
> Bye,
> Tassilo
>
>
>
>