Hi, Is it possible to run the macro in math mode ? Thank you Fabrice \usebodyfont [stix] \setupbodyfont[modern] \setupmathematics[stylealternative=calligraphic] \unexpanded\def\CScript#1#2{\start\switchtobodyfont[stixtwo] \m{{\mathscript{#1}}_{#2}}\stop} \unexpanded\def\cscript#1{\start\switchtobodyfont[stixtwo]\m{{\mathscript{#1}}}\stop} \starttext \cscript{P} \startformula \cscript{P} \stopformula \stoptext