Henri,

Thanks for the suggestion. I tried to add the additional fonts, but this did not seem to make a difference. The math equations render fine, but a search performed for terms in an equation still does not work when I specify the font. When I remove the font specification, it works fine. There must be some difference in the font that is used even if I don't specify a math font. Any other thoughts about why the math font changes or how to get a math font that is searchable, or get back to the default math font?

-Lance

------------------------------

Message: 4
Date: Fri, 18 May 2018 18:55:14 +1200
From: Henri Menke <henrimenke@gmail.com>
To: ntg-context@ntg.nl
Subject: Re: [NTG-context] Fonts and equations
Message-ID: <12743277-ebd0-67c7-2393-fe33e97bfaac@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed

On 17/05/18 23:19, Lance Larsen wrote:
> I have a context document with several equations. One really nice
> feature with equations is that by default you can search for variable
> names in equation in a PDF reader like acrobat. However, I needed to
> configure the document to use arial for the text. Once I do this, the
> equations are no longer searchable. I assume something happened to the
> mathematics font. How to I change the font for the document text, but
> keep the math equations searchable? Is there a way to change the
> document font, but not affect the math font? Here is a sample of how I
> configured the font. The equations are no longer searchable.
>
> % Load the Arial font values for regular, italics, bold, etc.
> \starttypescript [serif] [arial]
> \definefontsynonym [Serif] [name:arial]
> \definefontsynonym [SerifBold] [name:arialbold]
> \definefontsynonym [SerifItalic] [name:arialitalic]
> \definefontsynonym [SerifSlanted] [name:arialitalic]
> \definefontsynonym [SerifBoldItalic] [name:arialbolditalic]
> \definefontsynonym [SerifBoldSlanted] [name:arialbolditalic]
> \definefontsynonym [SerifCaps] [name:arial]
> \stoptypescript
>
> % Now we define the 'arial' font as an available option
> \definetypeface [arial] [rm] [serif] [arial]

The typeface "arial" you defined has no math font (and no sans and no
mono font). Add those and you should be fine:

\definetypeface [arial] [rm] [serif] [arial]
\definetypeface [arial] [ss] [sans] [modern]
\definetypeface [arial] [tt] [mono] [modern]
\definetypeface [arial] [mm] [math] [modern]

>
> % Set 'arial' 10pt as the default font for the document
> \setupbodyfont [arial,rm,10pt]
>
> \starttext
>
> $z_1 = x_1 + y_1$
>
> $a = b + c$
>
> \stoptext
>