erm, you mean when importing sprites? The purple is the area that will be transparent.
edit: oh, no offence or anything, but you should consider reading the manual that comes with the program. A simple search for "sprites" gives all the information you need on importing, for example.
edit: oh, no offence or anything, but you should consider reading the manual that comes with the program. A simple search for "sprites" gives all the information you need on importing, for example.