kuja, i don't think this will be in any "official" sites and books. This is one of the many things that's explained only in "Ultimania".

Oh, and you know why I need a rapid controller? Because, if you just have it hold down to the button, you can't close from the EXP, Gil, Item menus.

Yeah, interesting, right? Yeah, FFIX has full of these little things... damn those programmers!! lol, just kidding. They made a great game.