Split a special windows in horizontal

Question

I have known using (setq split-width-threshold 1) splitting windows in horizontal by default.

But I want to only split a window such as slime in horizontal and other window is vertical by default.

Is there a way to do this?

With respect to setting a low value for either split-width-threshold and split-height-threshold, please read the doc-strings for the variables -- e.g., perhaps the value of nil is appropriate or a higher value. M-x describe-variable. — lawlist, Feb 13 '17 at 5:20
See also -- "How to force the window splitting direction when starting slime?": emacs.stackexchange.com/questions/29123/… — lawlist, Feb 13 '17 at 6:10

Vonfry · Accepted Answer · 2017-02-13 06:58:26Z

Thanks for @lawlist .

I have find the solution and known more about split-width-threshold and split-height-thershold.

By default, emacs will split window in horizontal when the window's columns greater then 160 columns.

Setting a integer number to split window sensibly or set split-window-preferred-function for a custom function for splitting.

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