Hi Aditya, I made a mathstyle mechanism ... used in fences first: \starttext \startTEXpage[offset=1ex] \def\TestMe#1% {\NC \ttbf #1 \NC \ruledhbox{$\setupmathstyle[#1]x + x_j^2 + x_i^{e^2} + \frac{1}{x}$} \NC \ruledhbox{$\setupmathstyle[#1,small]x + x_j^2 + x_i^{e^2} + \frac{1}{x}$} \NC \NR} \starttabulate[|l|r|l|] \HL \NC \NC \NC \ttbf ...,small \NC \NR \HL \TestMe{text} \TestMe{text,cramped} \TestMe{script} \TestMe{script,cramped} \TestMe{scriptscript} \TestMe{scriptscript,cramped} \TestMe{display} \TestMe{display,cramped} \HL \stoptabulate \stopTEXpage \startTEXpage $x\begingroup\setupmathstyle[script]x\endgroup x$ \par $x{\setupmathstyle[script]x}x$ \par $x\startmathstyle[script]x\stopmathstyle x$ \stopTEXpage \definemathfence [scriptbracket] [bracket] [command=yes,color=red,mathstyle=script] \definemathfence [smallbracket] [bracket] [command=yes,color=green,mathstyle=small] \definemathfence [normalbracket] [bracket] [command=yes,color=blue] \startTEXpage[offset=1ex] \startbuffer test $a\frac{1}{normal}\scriptbracket{\frac{1}{script}}\normalbracket{\frac{1}{normal}}\smallbracket{\frac{1}{small}}c$ test \par \stopbuffer \getbuffer \setupmathfences [color=red] \getbuffer \stopTEXpage \stoptext \starttext \definemathfence [fancybracket] [bracket] [command=yes,color=blue] test $|x|$ test \par test $||x||$ test (okay) \par test $a\left|\frac{1}{b}\right|c$ test \par test $a\left||\frac{1}{b}\right||c$ test (not okay) \par \startbuffer test $a\fenced[bar]{\frac{1}{b}}c$ test \par test $a\fenced[doublebar]{\frac{1}{b}}c$ test \par test $a\fenced[bracket]{\frac{1}{b}}c$ test \par test $a\fancybracket{\frac{1}{b}}c$ test \par \stopbuffer \getbuffer \setupmathfences [color=red] \getbuffer \stoptext Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------