This article is obsolete. The Chart item is now superseded by the more advanced Graph item. The Graph item is most often used for building powerful OLAP/Pivot charts.
The ScaleBreaks feature allows you to "break off" large chunks of the axis so that graphs with large amplitude are easier to read. ScaleBreaks are available for both YAxis and YAxis2 of the plot area. You can tailor the maximum number of breaks, the minimum interval between data points before a break can occur, the visual size of the breaks and the visual style of the breaks.