Hi Hongwen Qiu, It was the same others opentype math fonts example: \usetypescript[cambria] \switchtobodyfont[cambria,10pt] \starttext \startformula \sqrt{abcde} \stopformula \stoptext \usetypescript[euler] \switchtobodyfont[euler,10pt] \starttext \startformula \sqrt{abcde} \stopformula \stoptext \starttypescript [math] [asana] [name] \definefontsynonym [MathRoman] [name:Asana-Math][features=math\mathsizesuffix] \stoptypescript \switchtobodyfont[asana,10pt] \starttext \startformula \sqrt{abcde} \stopformula \stoptext -- Best regards, Ze 在 2010年9月14日 上午11:35，Hongwen Qiu 写道：

 The \sqrt is not work properly in Mkiv. The following is the minimal example, and the result is attached \setupbodyfont[xits] \starttext \startformula \sqrt{abcde} \stopformula \stoptext

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net archive  : http://foundry.supelec.fr/projects/contextrev/ wiki     : http://contextgarden.net ___________________________________________________________________________________