On Fri, May 26, 2023 at 6:34 PM Eli Zaretskii <eliz@gnu.org> wrote:
>
> > From: Hongyi Zhao <hongyi.zhao@gmail.com>
> > Date: Fri, 26 May 2023 17:35:29 +0800
> > Cc: help-gnu-emacs@gnu.org
> >
> > > You are missing the "shift-select" feature, which the Shift key in
> > > C-S-<END> activates.
> >
> > How to find the detailed expansion on this feature from the built-in document?
>
> As usual: "C-h R emacs RET", then "i shift-select RET".

Thank you for the tip. Got it, as shown in the attachment.

Zhao