Umm, you can set the black parts of your panels to be transparent. Like Widi said, just write "flags = OVERLAY;" into your panel definition.

EDIT: For future reference, The_Unknown_Game: before you ask simple questions like this, look for answers in the User's Manual. If your copy of Gamestudio didn't come with a manual (for whatever reason), just use the online manual, which can be found on the side bar in this forum. Thank you.