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* fullhz, kerning and glue
@ 2022-07-12 19:42 Henning Hraban Ramm via ntg-context
  2022-07-12 20:24 ` Hans Hagen via ntg-context
  0 siblings, 1 reply; 2+ messages in thread
From: Henning Hraban Ramm via ntg-context @ 2022-07-12 19:42 UTC (permalink / raw)
  To: mailing list for ConTeXt users; +Cc: Henning Hraban Ramm

Hi,
I just added an explanation of "fullhz" to the options in 
https://wiki.contextgarden.net/Command/setupalign.
but I’m actually unsure if it’s right.

In the sources I found:
https://source.contextgarden.net/tex/context/base/mkxl/hand-ini.mkxl

%D At some point we can introduce extreme expansion, i.e. \type 
{\normaladjustspacing\plustwo}.
56
57% 0 = disabled
58% 1 = notused      (thesis)
59% 2 = glyph + kern
60% 3 = glyph only   (default)
61
62\def\font_expansion_enable  {\normaladjustspacing\plusthree}
63\def\font_expansion_enable_k{\normaladjustspacing\plustwo}
64%def\font_expansion_enable_n{\normaladjustspacing\plusone}
65\def\font_expansion_disable {\normaladjustspacing\zerocount}

And "fullhz" in spac-ali.mkxl calls \font_expansion_enable_k.

So, apparently fullhz enables stretching of *kerning* – that sounds to 
me like letterspacing.

OTOH in my notes (and thus in my book) I have the information that 
fullhz enables stretching of *glue*, and I thought that would mean 
whitespace outside of words.

Please enlighten me?

Hraban
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* Re: fullhz, kerning and glue
  2022-07-12 19:42 fullhz, kerning and glue Henning Hraban Ramm via ntg-context
@ 2022-07-12 20:24 ` Hans Hagen via ntg-context
  0 siblings, 0 replies; 2+ messages in thread
From: Hans Hagen via ntg-context @ 2022-07-12 20:24 UTC (permalink / raw)
  To: Henning Hraban Ramm via ntg-context; +Cc: Hans Hagen

On 7/12/2022 9:42 PM, Henning Hraban Ramm via ntg-context wrote:

> And "fullhz" in spac-ali.mkxl calls \font_expansion_enable_k.
> 
> So, apparently fullhz enables stretching of *kerning* – that sounds to 
> me like letterspacing.
no, it's the inter-character kerning (the tiny thingies)

Hans

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2022-07-12 19:42 fullhz, kerning and glue Henning Hraban Ramm via ntg-context
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