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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [BUG] ov property line height failed on lone length line when
 exceeded window width
Date: Thu, 04 Jun 2020 16:16:44 +0300
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In-Reply-To: <87a71jlky8.fsf@gmail.com> (message from stardiviner on Thu, 04
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> From: stardiviner <numbchild@gmail.com>
> Cc: emacs-devel@gnu.org
> Date: Thu, 04 Jun 2020 08:43:27 +0800
> 
> > In that case, this is the expected behavior: if the newline with the
> > line-height property is not visible, the setting has no effect.  It is
> > conceptually the same as having a tall character or image displayed on
> > a line: if you then truncate the line so that the tall element is not
> > visible, the line's height will be decreased to reflect what is
> > actually on display.
> 
> I have a little kind of understand. Hmm, is there any workaround of this
> situation? I want it to be displayed anyway. Change my code, or toggle some
> options or something else?

Can you describe what are you trying to accomplish, and for what
purpose?  Maybe then we could propose a workaround.