Superfish - submenu items disappear beneath the bottom border of the window

Superfish - submenu items disappear beneath the bottom border of the window

I have a 3 level menu and the last of the level 2 items is the parent of a set of additional level 3 items. Most of the level 3 items beneath that last level 2 item are not visible because they appear beneath the bottom of the browser window.

Is there some way to make a set of sub-items appear above and to the right of the parent item when this situation occurs?