Bluray keyboard commands in Showtime 4

I just got the Blu-ray plug-in for Nero 8. Anyone know what the keyboard command is for getting the pop-up menu directly for Bluray movies? I know about using the L key, but that’s very clunky, since it brings up a Showtime menu (blocking part of the movie) and you have to then manually choose from “Top menu” or “Popup Menu”. It would be great if there was a single keyboard command that just brings up the pop-up menu.

I should add that I have checked the latest Nero Help guides. They do mention using the L key, but nothing else.