Tilesets are used to create maps in RPG Maker XP. A tileset is a tall thin picture made up of squares, or tiles. Each tile is 32x32 pixels. A tileset is exactly 8 tiles wide, and any number of tiles high (there is a limit of about 5000, but this is usually more than enough). Tilesets are kept in the folder "Graphics/Tilesets". RPG Maker XP can handle up to 999 different tilesets, which should be more than sufficient for even the largest of games. Editing a tileset is as simple as editing a picture.