At Tue, 27 Apr 2010 17:43:35 +0300,
Juri Artamonov wrote:
> I'm newbie in emacs. Could please advice. Somehow I get my agenda
> view appears vertically, i.e from the right side from my org file.
>
> I open org file then press C-c a and I see "Agenda Commands" in the
> window to the right, not to the bottom as it was before.  Could you
> please advice, how to make it back and make agenda view open
> horizontally?

You might check the two variables `split-height-threshold' and
`split-width-threshold' that could be used to determine whether to
split the window vertically or horizontically:

M-x apropos RET split-window-sensibly RET

,----
| split-window-sensibly is a compiled Lisp function in `window.el'.
|
| (split-window-sensibly window)
|
| Split window in a way suitable for `display-buffer'.
| If `split-height-threshold' specifies an integer, window is at
| least `split-height-threshold' lines tall and can be split
| vertically, split window into two windows one above the other and
| return the lower window.  Otherwise, if `split-width-threshold'
| specifies an integer, window is at least `split-width-threshold'
| columns wide and can be split horizontally, split window into two
| windows side by side and return the window on the right.  If this
| can't be done either and window is the only window on its frame,
| try to split window vertically disregarding any value specified
| by `split-height-threshold'.  If that succeeds, return the lower
| window.  Return nil otherwise.
|
| By default `display-buffer' routines call this function to split
| the largest or least recently used window.  To change the default
| customize the option `split-window-preferred-function'.
|
| You can enforce this function to not split window horizontally,
| by setting (or binding) the variable `split-width-threshold' to
| nil.  If, in addition, you set `split-height-threshold' to zero,
| chances increase that this function does split window vertically.
|
| In order to not split window vertically, set (or bind) the
| variable `split-height-threshold' to nil.  Additionally, you can
| set `split-width-threshold' to zero to make a horizontal split
| more likely to occur.
|
| Have a look at the function `window-splittable-p' if you want to
| know how `split-window-sensibly' determines whether window can be
| split.
`----

HTH
 -- David
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