rowalign="top center bottom"
$\begin{array}{ccc}& & \\ & & \\ & & \end{array}$
rowalign="bottom top center"
$\begin{array}{ccc}& & \\ & & \\ & & \end{array}$
rowalign="center bottom top"
$\begin{array}{ccc}& & \\ & & \\ & & \end{array}$