[XeTeX] additional beginL endL nodes in math

David Carlisle d.p.carlisle at gmail.com
Sat Apr 18 00:33:56 CEST 2015

On 17 April 2015 at 21:43, Ross Moore <ross.moore at mq.edu.au> wrote:

> B.
> I'm currently writing a paper describing a method to attach tooltips to
> mathematical symbols and expressions. After setting the chunks in boxes for
> measuring, this ultimately puts
>    \pdfannot ....
> into the math-stream.
> To not affect spacing, this would need to be a  boojum  surely.

As with colour, the \pdfannot whatsit shouldn't affect spacing so long as
avoid placing it in the middle of a word where it may affect inter-letter
kerns or ligatures.

\pdfannot{..}a should have the same spacing as a

\mathrel{\pdfannot{..}=} should have the same spacing as =

> I can supply instances where spacing has changed, by an extra thin space.
> Sometimes placing extra {...} avoids this extra space, other cases require
> a \! to fix.
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