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From: Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>
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Subject: Re: background color of text in contour(former:
 ntg-context Digest, Vol 186, Issue 61)
Date: Sun, 29 Dec 2019 14:42:43 +0100
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Jeong Dal schrieb am 29.12.2019 um 14:33:
> Dear Hans,
>
> I run the following code which is in page 24,25 luametafun.pdf.
>
> 1. adding \starttext and \stoptext, it works fine. No overlapping.
> Also, functionstyle = “math” is working nicely.
>
> 2. removing \starttext and \stoptext, then functionstyle =“math” 
> invoked an error.
>
> 3. removing \starttext, \stoptext, and functionstyle=“math”, it 
> worked. However the caption
> “x=[…]; y=[….]” is overlapped.

ConTeXt doesn't preload fonts and only when no font was set untill 
\starttext latin modern is used as fallback font at this point.

When you omit \starttext no font is loaded and when you use math mode 
(which is the case when you use funtionstyle=math) the error message 
appears. Another fallback in this case it to load a monospaced font in 
horizontal or vertical boxes which is what you set in your example when 
you remove \starttext.

Wolfgang


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Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 8bit

<html theme="default-light"><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><body text="#000000"><span>Jeong Dal schrieb am 29.12.2019 um 
14:33:</span><br>
<blockquote type="cite" 
cite="mid:486A17AE-B9AA-40EE-9577-5FBFFA469108@me.com" style="word-wrap:
 break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
Dear Hans,
  <div class=""><br class=""></div>
  <div class="">I run the following code which is in page 24,25 
luametafun.pdf.</div>
  <div class=""><br class=""></div>
  <div class="">1. adding \starttext and \stoptext, it works fine. No 
overlapping. </div>
  <div class="">Also, functionstyle = “math” is working nicely.</div>
  <div class=""><br class=""></div>
  <div class="">2. removing \starttext and \stoptext, then functionstyle
 =“math” invoked an error.</div>
  <div class=""><br class=""></div>
  <div class="">3. removing \starttext, \stoptext, and 
functionstyle=“math”, it worked. However the caption </div>
  <div class="">“x=[…]; <span class="Apple-tab-span" style="white-space:pre">	</span>y=[….]”
 is overlapped.</div>
</blockquote>
<br>
ConTeXt doesn't preload fonts and only when no font was set untill 
\starttext latin modern is used as fallback font at this point.<br>
<br>
When you omit \starttext no font is loaded and when you use math mode 
(which is the case when you use funtionstyle=math) the error message 
appears. Another fallback in this case it to load a monospaced font in 
horizontal or vertical boxes which is what you set in your example when 
you remove \starttext.<br>
<br>
Wolfgang<br>
<br>
</body></html>

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