1. A graphic processing apparatus for performing a predetermined process on a target graphic object composed of a plurality of graphic primitives, comprising: (a) an input element for inputting said target graphic object; (b) an extraction element for searching said target graphic object for a graphic primitive forming an outermost closed figure to extract said graphic primitive from said target graphic object; and (c) a display element for displaying said graphic primitive extracted from said target graphic object by said extraction element discernibly from other graphic primitives, wherein said plurality of graphic primitives are specified by graphic data.