On Wed, Dec 6, 2017 at 3:56 AM, martin rudalics <rudalics@gmx.at> wrote:

> > ​It is frame-bound.  I tested display-buffer-in-side-window
> > and that did the trick.  Thanks.  Is set-window-dedicate-p
> > also needed or does the side window setup take care of that?
>
> `set-window-dedicated-p' (with a "d") is not needed.  Another buffer may
> appear in this window if and only if it has been set up to use the same
> side and slot.


​Great.

In the doc string for display-buffer-in-side-window, it says: "Unless
‘display-buffer-mark-dedicated’ is non-nil, softly
dedicate the side window used to BUFFER."

No one will know what 'softly dedicate' means.  If it means what you said
above, that should be explained in the doc string too.
​

> ​​
>
> ​​
>
> ​​
> > If you don't want delete-other-windows to delete this window,
> ​​
> > then also add:
> ​​
> >
> ​​
> > (set-window-parameter (selected-window) 'no-delete-other-windows t)
> ​​
>
> ​​
> Indeed, see Bug#27999.


​Thanks for the pointer to some of the thinking that went into the design
of the side window feature.
It is working well for me in use with the Treemacs package.

Bob