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The extensible arrow, example below, looks perfect on-screen but prints
<br>
with a very slight vertical mismatch between the standard LaTeX
rightarrow and a <br>
tacked on rule [I am guessing that this is how xrightarrow is
defined]<br><br>
The resolutions are both the same at 300 dpi so where's the glitch
please?<br><br>
\usepackage{amsmath,amssymb}<br>
............................................<br>
\begin{align}<br>
\label{RO2_eqn1}<br>
& \mathrm{RO\dot{O}
\xrightarrow[H\dot{O}_2,H_2O_2,CH_3\dot{O}_2]{1.35} Products} \\<br>
& \mathrm{RO\dot{O} \xrightarrow[RO\dot{O}]{0.12} 2\:R\dot{O} + O_2 }
\\<br>
& \mathrm{RO\dot{O} \xrightarrow[\dot{R}]{0.11} 2\:R\dot{O} }\\<br>
& \mathrm{RO\dot{O} \xrightarrow[RH]{0.083} \dot{R} + RO_2H}
\label{RO2_eqn4}<br>
\end{align}<br><br>
<x-sigsep><p></x-sigsep>
<tt>
Professor John M. Simmie<br>
Chemistry Department & Environmental Change Institute<br>
National University of Ireland, Galway::Ireland<br>
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