Apple iWork '08 - Manual (Page 93)

Chapter 2 Getting Started with Numbers 93
m For more extensive chart editing, use the Chart Inspector: Click Inspector in the toolbar
and then click the Chart Inspector button.
Format labels, tick marks, and more.
Click Axis to format the chart axes.
Click Series to format a chart’s bars, pie
wedges, or other data elements.
Show or hide axes and chart borders.
Set the range of values that appear.
Adjust the chart element colors.
The Chart Inspector button