Got it. Thanks.

On Sun, Oct 29, 2017 at 7:18 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Xiaolong Zhang <xlzhang921@gmail.com>
> > Date: Sun, 29 Oct 2017 18:57:36 +0800
> > Cc: 29036@debbugs.gnu.org
> >
> > If the file is already visited in Emacs, it won't recenter. Is it
> possible to make
> > Emacs recenter even if it's already visited?
>
> You can only do that by customizing the scrolling behavior in
> general.  There's no special behavior for visiting a file that is
> already in Emacs.
>