Juri Linkov <juri@linkov.net> writes:

>>>> Anyway, pre/post hook hack is very useful, and works with many commands, but not
>>>> with all, so it is not 100% failsafe and general.Try to execute Info-mode
>>>> from other window but Info (shortcut 'm'). In my Emacs it does not work.
>>>
>>> I tried 'm' (Info-menu), and it works nicely without any problem.
>>> As long as key prefixes are the same in both windows.
>>
>> Ok. Then perhaps I am doing something wrong? How do you run it, is the posted
>> code snippet all you use, or is there something else there? For me it does not
>> work at all.
>
> With this code snippet:
>
> #+begin_src emacs-lisp
> (progn
>   (add-hook 'pre-command-hook
>             (lambda ()
>               (other-window 1)
>               (setq this-command (key-binding (this-command-keys)))))
>   (add-hook 'post-command-hook (lambda () (other-window -1))))
> #+end_src
>
> in 'emacs -Q' type: C-x 4 4 C-h i m emacs RET
>
> and it opens the Emacs Manual.

I tested now, and it did work. But I ended up with two info window? :)
I have started with two-window setup, info and scratch, left and right and I
think pre-commands created new window instead of selected the other window. You
can see in the screenshot, but other than that it worked.