This guide to the design and production of overhead transparencies begins with a matching test of related terminology and definitions. Introductory materials include an outline of advantages and disadvantages of using transparencies; a list of recommended uses of the overhead and transparencies; tips for overhead presentations; general presentation techniques; criteria for evaluating transparencies and presentations; and suggestions for the storage of transparencies. Different types of transparencies are then described and guidelines for transparency design are provided. Mounting, masking, and overlaps are also described, as well as lettering techniques for schools and media centers. Instructions are provided for reducing pictures with the overhead projector, using an opaque projector to produce lettering, free cutting letters, and creating a visograph, i.e., a transparent-faced display pocket with one open edge. The list of resources that concludes this guide includes the names and addresses of suppliers of various materials, including art supplies, clip art, lettering, transparency films and pens, stencil guides, transparency tape, and dry transfer letters. (EW)