Specifies whether the chart item is displayed within the customization form.
property VisibleForCustomization: Boolean read; write; default True;
A hidden chart item appears in the customization form provided that the item’s VisibleForCustomization property is set to True. Otherwise, end-users will be unable to place the chart item back to the View since it’s hidden in the customization form.
To display the customization form, set the View’s Controller.Customization property to True.
The default value of the VisibleForCustomization property is True.