\def\:temp#1{% {\m@th\ensuremath{_{\mbox{\fontsize\sf@size\z@#1}}}}} \ifx \@textsubscript\:temp \def\:tempc#1{{\m@th% \ifmmode {\HCode{}}\sb {\mbox{\fontsize\sf@size\z@#1}}% \else% \a:textsubscript% {\mbox{#1}}\b:textsubscript% \fi }} \HLet\@textsubscript\:tempc \fi \NewConfigure{textsubscript}{2} \Configure{textsubscript} {$\relax{\HCode{}}\sb} {$} \Hinput{subscript} \endinput