My students complain that the dot in, for example, $\dot M$ is too small and that they easily miss it. So I have been trying to make a bigger one, but haven't found a solution that plays nicely with the surrounding math. For example, \def\mydot{\overset{\externalfigure[dot.pdf]}} %bigger than usual one \def\Vdot{\mydot V} \starttext $\rho\Vdot\omega$ % loose spacing $\rho V\omega$ % tighter spacing \stoptext where dot.pdf is a circle of radius 0.8bp (attached). But the \Vdot gets wrapped in an hbox (inside \overset), so the surrounding space is too large. I also tried a metafun approach \startuniqueMPgraphic{math:mydot} fill unitcircle scaled 2 shifted (OverlayWidth/2-1,OverlayHeight+OverlayOffset); path q; q:= unitsquare xscaled OverlayWidth yscaled (OverlayHeight+OverlayOffset+1); setbounds currentpicture to q; \stopuniqueMPgraphic \definemathornament [mathmydot] [mp=math:mydot] \starttext $\rho\mathmydot{V}\omega$ $\rho V\omega$ $\rho\mathmydot{V}_0^2\omega$ $\rho\dot{V}_0^2\omega$ \stoptext The $\rho\mathmydot{V}\omega$ looks good. But the subscripted _0 is not tucked under the V, because the bounds of the character are now a rectangle that doesn't know about its shape. I think for a similar reason the superscripted 2 is quite high. Is there more math-friendly (and elegant) way to get a fatter dot? -Sanjoy