[Typo3] typoscript subpage menu, How do I...?

[Jacob Floyd]

I've scoured the TSref, and I can't figure out how to do what I want
in typoscript.

I want to have a text menu with all of the subpages of the current
page appear on every page that there are subpages, but not on the
pages without subpages.

Entrylevel doesn't seem to do quite what I want.

Can anyone point me in the right direction?

Thanks!