Transparencies that are mounted on cardboard mounting frames are easier to handle, have greater protection against damage, and permit the instructor to write notes and transparency sequence number on the frames. When possible add a color with transparency markers. Use at least 14 point print. Six word limit per line. Use upper and lower case letters.
All uppercase letters are harder to read.
If a transparency is readable at six feet, it's readable for the entire audience. When doing lists, uncover the items one by one instead of permitting the audience to read ahead and not hear what you have to say about each point. Charts and illustrations are more easily remembered than words. Overhead Projector Have the overhead projector focused before the training begins. Make sure the overhead transparencies can be read by those seated at the back of the room.