List two components of visual aids that you have used recently. describe how you used them

Overhead projector slides/transparenciesoverhead projector slides/transparencies are displayed on the overhead projector (ohp) - a very useful tool found in most lecture and seminar rooms. the ohp projects and enlarges your slides onto a screen or wall without requiring the lights to be dimmed. you can produce your slides in three ways: pre-prepared slides : these can be words or images either hand written/drawn or produced on a computer; spontaneously produced slides: these can be written as you speak to illustrate your points or to record comments from the audience; a mixture of each: try adding to pre-prepared slides when making your presentation to show movement, highlight change or signal detailed interrelationships.make sure that the text on your slides is large enough to be read from the back of the room. a useful rule of thumb is to use 18 point text if you are producing slides with text on a computer. this should also reduce the amount of information on each slide. avoid giving your audience too much text or overly complicated diagrams to read as this limits their ability to listen. try to avoid lists of abstract words as these can be misleading or uninformativevisual aids  are defined as charts, pictures or images that to make a point or enhance a presentation. an  example  of  visual aids  are bar graphs and pie charts that are used to illustrate percentages of products sold and the change in sales over time.