ITChart.OnBeforeDrawAxes
ITChart

property OnBeforeDrawAxes: TNotifyEvent;

Type Library
TeeChartx

Description
BeforeDrawAxes event is called just before the axes are painted. It can be used, for example, when you wish to draw to the Canvas below the visible Chart. Legend and Chart Header are painted before this event is called.

WARNING:

Do not change Axes properties that would force the Axes to be repainted.

This may cause recursion and endless repainting !