The overhead projector stage is 11 inches square, so transparencies may be made in either the vertical or horizontal format. If you are creating your own transparency masters, use at least a 24 point type size, and use a sans serif typeface if possible. If you can't easily read the transparency master at arm's length, then your class will not be able to read it easily when it's projected on the screen. However, these things can be copied by making a photocopy of them. Photographs and shaded images will not make a good transparency - the thermal machine cannot read shades of gray.
Line drawings are preferred.
The EMS has a copystand that can make slides from pictures in books, magazines, or photographs. Materials to be copied should not be smaller than 4 inches by 6 inches. 24 hour advance notice is required, since we have to prepare the film. Color slide film, balanced to our tungsten copy lights, is available through the EMS at cost. The patron then takes the film to be processed at their expense.