Hi, I wish to use the Nimbus fonts, but since I didn't know which Math fonts is best adapted to this family, I tried several fonts such as Stix Math, TeX Gyre Math, and so on, but doing this the math-italic does not appear in these fonts: does this mean that I have to set explicitely math-italic in definefontfamily? Also what is the best math font adapted for Nimbus? Below is my definition of a fontfamily for Nimbus fonts. Thanks in advance for any help: Otared K %% begin definefontfamily-nimbus.tex \definefontfamily [mainface] [rm] [Nimbus Roman No9 L] \definefontfamily [mainface] [ss] [Nimbus Sans L] [rscale=0.85] \definefontfamily [mainface] [tt] [Nimbus Mono] [features=none,rscale=0.95] \definefontfamily [mainface] [mm] [STIX Math] %\definefontfamily [mainface] [mm] [Asana Math] %\definefontfamily [mainface] [mm] [Lucida Bright Math OT] %\definefontfamily [mainface] [mm] [TeX Gyre Termes Math] %\definefontfamily [mainface] [mm] [XITSMath] \setupmathematics[integral=nolimits,lcgreek=normal,default=normal] \setupbodyfont[mainface] \starttext {\rm\tf Regular \it Italic \bf Bold \bi BoldItalic} {\ss\tf Regular \it Italic \bf Bold \bi BoldItalic} {\tt\tf Regular \it Italic \bf Bold \bi BoldItalic} And here are a few math formulas $\alpha^2 + \beta^2 + \gamma^2 = x^2 + y^2 + t^2$. \startformula \int_{0}^{2\pi} \sin(x)dx = 0, \qquad {\rm e}^{{\rm i}\pi} + 1 = 0, \qquad \sum_{n=1}^{\infty}{1 \over n^2} = {\pi^2 \over 6}. \stopformula \stoptext %% end definefontfamily-nimbus.tex