Art Composition can be summed up in one statement from the man who literally wrote the book that most professional illustrators behold as the holy grail of illustration. "The Principle of overlapping areas, forms and contours is the basis of all pictorial creation. Since line is our first means of defining these then linear arrangement becomes our first consideration." - Andrew Loomis After reading this, art composition should become a little clearer. In its most basic form, composition is the arrangement of line. Since line makes up everything, then this naturally makes sense. Tip: A great tool when creating.