Yep, malick is right, Just go to a paint program (i use paint.NET) and make a picture (pixels 50-200, thats what I use) and write the name of the map, but delete the background of the picture, If you like, (this is what i've done) you can draw like a picture too, I've made a map called Kings Castle, and it says Kings Castle in top left, with a picture of a castle to the left of it, it looks cool.