Limit the number of words per visual to no more than 30.

Leave space, at least the height of a capital letter, between lines of text.

All fonts, including those on graphs, should be 18 point or larger.

Graphs and charts should have bold lines and symbols that contrast sharply with the background.

Your presentation time is about 15 minutes, leaving about 5 minutes for questions from the audience.

A reasonable presentation time for each slide is about 2 minutes, as any shorter interval will make it difficult for the audience to understand.

Do not waste visuals where they are not needed. Use them where a picture, chart, diagram, or cartoon will help. Tables of figures are hard to read and understand quickly, use pie charts or column graphs instead. 

If it takes longer than 10 seconds to comprehend a visual, then there’s too much material in it. Do not put anything on the visual if you don't need it. Tell what each visual is all about, but do not read from it. Keep it on screen, as long as your talk refers to it.