Setting Axis and Data Bounds
Normally a graph displays all of the data it contains. Sometimes you may want to display only part of the data. There are two ways to frame a specific part of the chart: by fixing data bounds, or by fixing axis bounds.
Fixing axis bounds generally gives better results than fixing data bounds. The chart determines the extent of each axis by considering the lowest and highest data value, the origin, and the numbering increment.
Axis Min and Max