Re: How to Display a Zero Height Line

[Eli Zaretskii <eliz@gnu.org>]

> From: Psionic K <psionik@positron.solutions>
> Date: Thu, 12 Dec 2024 15:37:31 +0900
> Cc: help-gnu-emacs@gnu.org
> 
> > And what is the problem with what the above snippet produces?  Is the
> > problem that you _want_ the background color extended to EOL?  If so,
> > you need to use (:extend t), and you need to make sure the face
> > affects the entire line till the newline.
> 
> The background of TODO extends vertically in a graphical client.  I
> want the space between the two lines.  I do not want the background of
> the TODO to extend to the previous line.  Any and all intended
> workarounds are acceptable.  I am merely choosing an implementation of
> an effect in Dslide and it doesn't matter how it works.

I still don't understand, but did you try to use the :extend
attribute?  It extends the background to the window's edge past the
last character visible on the line.  It does NOT extend to previous
lines.