Hi, I have asked this question on tex.stackexchange.com http://tex.stackexchange.com/questions/113592/formulas-in-context-are-differ... as the title said, formulas typeset by ConTeXt are different from those by plain TeX. The minimal examples are here: % plain luatex in ConTeXt standalone $$\int_a^bf(x)dx=F(b)-F(a)$$ \bye % context \starttext \startformula \int\nolimits_a^bf(x)dx=F(b)-F(a) \stopformula \stoptext Marco said to me that that's because the fonts used by LuaTeX and ConTeXt are different. This can be seen from the pdf produced by them pdffonts context.pdf name type emb sub uni object ID ------------------------------------ ----------------- --- --- --- ---------OLAZTU+LMRoman12-Regular CID Type 0C yes yes yes 18 0 RXHAAY+LatinModernMath-Regular CID Type 0C yes yes yes 19 0JTHTZJ+LatinModernMath-Regular CID Type 0C yes yes yes 20 0 pdffonts plain.pdf name type emb sub uni object ID------------------------------------ ----------------- --- --- --- --------- APMHZE+LMMathExtension10-Regular Type 1 yes yes no 4 0 AWBTPY+LMMathItalic7-Regular Type 1 yes yes no 5 0 ITITNI+LMMathItalic10-Regular Type 1 yes yes no 6 0 DMNVHT+LMRoman10-Regular Type 1 yes yes no 7 0 MGKPYK+LMMathSymbols10-Regular Type 1 yes yes no 8 0 even if using the `modern-designsize-virtual` typescript(advice from Marco), I still get the different outputs. Now, I get confused about this qustion. If ConTeXt uses LuaTeX as its engine, how can I tune ConTeXt so that it can produce the same formulas with those in plain TeX? Tim