# Re: [NTG-context] Fonts and equations

```
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

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