There is a configuration parameter that lets you decide whether limits
are displayed above and below operators like summations (like in TeX's
\displaystyle) or to the right (like in TeX's \textstyle), but that is
global, and affects all equations, no matter where they appear.
I considered whether to add a distinction between in-line and display
math (say `...` and ``...``) and switch the parameter depending on
which is used, but decided to stick with the pure ASCIIMathML approach
for compatibility's sake.
Davide