possible to use call deft-open-file-in-other-window on file selection instead of the default? about deft HOT 1 OPEN

This is an old question and I'm no lisp guru myself, but I thought I'd share what I'm currently using.

First, define a personal function to open the file from deft in the other window.
The argument t is there to also move focus to that window after opening the file.

(defun efls/deft-open ()
 (interactive)
 (deft-open-file-other-window t)
)

Next, let's bind this to the major mode leader key in spacemacs:

(with-eval-after-load 'deft
  (define-key spacemacs-deft-mode-map-prefix
    "o" 'efls/deft-open)
 )

Now you should be able to hit , o from the deft buffer, to open the file in the other window.
This doesn't make it the default, but its easy enough.

from deft.