Apple Keynote 3 - Manual (Page 125)

Chapter 6 Creating Charts 125
Transposing Data Series and Data Sets
You can easily switch the data series and data sets in your charts—without having to
retype the data—by using the Plot Row vs. Column button in the Chart Data Editor.
The column chart below shows the same data, but with the data sets and data series
transposed.
This button makes the rows
of data in the Chart Data
Editor the data series.
This button makes the
columns of data in the Chart
Data Editor the data series.