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    <font face="Courier New">Dear all,<br>
      <br>
      Is there some way to customize the font size when using xstring?<br>
      <br>
      For instance<br>
    </font><br>
    xstring(0, 0, "$\large p_{1}(t)$")<br>
    <br>
    creates p1(t) with a large font, but what if one wants exactly 12pt?<br>
    <br>
    I tried adding \fontsize{12}{12} and \fontsize{12}\selectfont but it
    doesn't work... <br>
    <br>
    Thank you.<br>
    <br>
    Regards,<br>
    <br>
    Federico Miyara<br>
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