1. An apparatus for displaying an object image, comprising: object image generating programmed logic circuitry for generating the object image by operating an object image generation program previously provided, according to instructions from a user: selecting programmed logic circuitry for selecting an arbitrary part of said generated object image, according to instructions from said user; transition information generating programmed logic circuitry for generating transition information when said object image is selected; and a transition information storage location for storing said transition information, wherein the object image arbitrarily selected by said user is recoverable at a future time according to the transition information stored in said transition information storage location and said object image generation program.