IChartAxis.IncludeZero

Syntax

IncludeZero: Boolean;

The IncludeZero property determines whether zero must be enabled on an axis.

If this property is set to True, zero is displayed on the axis; if this property is set to False, zero is not displayed.

The property is set to False by default.

Displaying zero on the Y axis is available if for the Y axis:

IChartAxis.Max and IChartAxis.Min has the fixed range of values, including zero. And the minimum value is much greater than zero.
The IChartAxis.AutoMin parameter is set to True.