Creation and application of GIF-animations in auxiliary-practical electronic editions

The electronic manual to the decision of problems on construction by a compasses and a ruler contains a plenty of graphic illustrations. Animation of illustrations with imitation of step-by-step performance of constructions increases a level of perception of drawings, forms steady associative visions. For preparation of animated gif-files of constructions by a compasses and a ruler programs Maple and Animation Shop are used. In article the scheme of preparation of an animated gif-file of construction of a midpoint is resulted.