I don't think you can.
The only people I have heard say that there are opacity settings are the ones who haven't used leopard. So I guess that means you cannot change the opacity.
Really? Not to blow my NDA or anything, but I've not found that setting? I'd love to make the menu opaque.
The only people I have heard say that there are opacity settings are the ones who haven't used leopard. So I guess that means you cannot change the opacity.