The Customize event is triggered when all chart data has been added and all chart properties have been set.

The most important use of this event is the adjustment of automatically calculated property values (properties that have been set to "Auto"). For example, Minimum and Maximum properties in the axis are set to "Auto" by default. Just before the chart is painted, the axis automatically calculates the maximum and minimum scale values by examining the series data.

When the Customize event is triggered, all properties are already calculated and stored as explicit values. If you make any changes to an element in the chart area, you may need to recalculate the axis properties so that the chart area is rendered correctly. To do this, use the RecalculateAxesScale method.