Seriously. This is a reoccurring issue that's been problematic and annoying.
If you're going to ask for help on something, PLEEEEEEEEEEASE tell us what program you are using first (VX, XP, 2K3, etc). You might be wanting to know how to do something for XP, but if you don't friggin' tell us this, someone might assume that you're working with VX and give you an answer that actually winds up corrupting your whole game. You don't want that to happen, do you? So just take a second to make it known what RPG Maker you are working with and be as detailed as possible, so that we can try to help you as best as possible.
Also, read the stickied rules first.