As a trainer you probably have many occasions when you want to present data in charts. And if you're like me, you use trial and error in the PowerPoint or Excel chart wizard to try to get the results you want.
A few weeks ago I got interested in a very popular book. Say It With Charts! by Gene Zelazny has been used by executives and other presenters as the guide for creating visuals for data.
Zelazny's method gets rid of the guesswork by giving you a methodology for determining precise