Subject: Re: bug#51821: 29.0.50; Suggest add variable or frame parameter: line-height

From: Eli Zaretskii <[email-masked]>
Date: Sun, 14 Nov 2021 10:03:47 +0200

> From: "Feng Shu" <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>,  [email-masked]
> Date: Sun, 14 Nov 2021 15:04:37 +0800
> 
> Does line-height exist in emacs just mean min line height? I do not know.

Yes.  The ELisp manual clearly says (note the last sentence):

     Thus, any valid height spec determines the height in pixels, one way
  or another.  If the line contents’ height is less than that, Emacs adds
  extra vertical space above the line to achieve the specified total
  height.