Re: Underline fontification

[Hendrik Rommeswinkel]

Hi Arash,

I am on Spacemacs so the look may differ on plain emacs.

Here is the difference before (left) and after (right) adjusting the 
overline-margin.

https://imgur.com/a/27f3bp0

As one can see, changing overline-margin also prevents the text from becoming 
"taller" after placing an overline. (By "taller" I mean the way $X^Y$ makes the 
text taller as well.)


Cheers
Hendrik


------- Original Message -------
On Monday, June 20th, 2022 at 9:24 PM, Arash Esbati <arash@gnu.org> wrote:


> Hendrik Rommeswinkel rommeswi@proton.me writes:
> 

> > Looking through some old emacs bugreports I just found out about the
> > variable overline-margin. If set to 0 instead of 2, overlines actually
> > look great. They are exactly symmetric to underlines with this
> > setting. So one could add overline fontification by adding an overline
> > font and setting overline-margin to 0 in auctex buffers.
> 

> 

> Can you please post some small screenshots exhibiting the difference? I
> mean, `overline-margin' has this docstring: ,----[ C-h v overline-margin RET 
> ] | overline-margin is a variable defined in ‘C source code’. | | Its value 
> is 2 | | Space between overline and text, in pixels. | The default value is 
> 2: the height of the overline (1 pixel) plus 1 pixel | margin to the 
> character height.` ----
> 

> and `underline-minimum-offset' has this: ,----[ C-h v 
> underline-minimum-offset RET ] | underline-minimum-offset is a variable 
> defined in ‘C source code’. | | Its value is 1 | | Minimum distance between 
> baseline and underline. | This can improve legibility of underlined text at 
> small font sizes, | particularly when using variable 
> ‘x-use-underline-position-properties’ | with fonts that specify an 
> UNDERLINE_POSITION relatively close to the | baseline. The default value is 
> 1.` ----
> 

> Is the distance between the two lines so huge?
> 

> Best, Arash

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