152 slide:ology
What is the most appropriate minimum font size? If you have
to ask, you may be using your slides as a document. Here are a
few good approaches:
Validating Your Font Size
T!P
Stay consistent. For keynotes, don’t go
smaller than 28 pt. If you are consistently
reducing your point size to under 24 pt and
using third-level bullets, you have officially
created a document and not a slide.
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2
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4
Measure the diagonal length of your computer screen. Let’s
say it’s a 21 inch monitor. Using a tape measure, place a
piece of tape 21 feet from your screen. If your screen is 17
inches, place the tape 17 feet away, etc. Then, launch a slide
on your screen into slide show mode. Whatever you cannot
see from behind the piece of tape probably can’t be seen
by the back of the room.
Put your file into slide sorter view. Look at the slides at 66
percent size. If you can still read them, so can your audience.
Stand in the back of the room at your venue and click
through all the slides so you know what people in the back
row will see.
Follow the advice of Guy Kawasaki, author and former Apple
Fellow: “A good rule of thumb for font size is to divide the
oldest investor’s age by two, and use that font size.”
Using Visual Elements: Background, Color, and Text 153
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