Layers and Menus in LumenRT LIVECUBE


I'm creating a LiveCube to send to a client, there are several different options that I've put on separate layers.  In LumenRT, I can go in to the menu and turn the layers on and off to display the various options but I can't seem to do that in the LiveCube.  In fact, I can't even get the menu to pop up in the LiveCube.  I know the LiveCube is a stripped down, portable version of LumenRT but it seems like I should still be able to see the menu and turn layers on and off.  I've tried Tab and Esc, is there another shortcut key that I'm missing?