– Make sure the audience can read what you are presenting. Font size should be at least 15 points.

– Do not put too much information onto an overhead or slide, and do not include unnecessary information.

– Arrange the information so that it is easy to follow

– Look at the overhead/slide when it appears on the screen. Check that the audience can see what you want to see.

 – Do not block the screen by standing in the line of vision.

 – Give people time to read your overhead or slide.

– Explain the details or a figure or table.

–  Make sure every visual aid has a purpose, and help the audience recognize that purpose.