\input{umtest-preamble} \usepackage{unicode-math} \begin{document} \setmathfont{XITS Math} \[ \vec a \quad \vec{a} \quad \vec{abc} \quad \overrightarrow{abc} \quad \underrightarrow{abc} \] \setmathfont{Cambria Math} \[ \vec a \quad \vec{a} \quad \vec{abc} \quad \overrightarrow{abc} \quad \underrightarrow{abc} \] \end{document}