If the SmartScaling (Property)is enabled, use this property to prevent text from being removed if an object is resized or repositioned to a minimum file sized. In the user interface, this property is enabled for new Chart sections, and disabled for 8.3 releases and earlier that have Smart Scaling enabled. Inserted text and legends are not affected by this property. Smart Scaling may shrink these objects, but they are never scaled to the point where they are eliminated entirely.
This example shows how to retain text when Smart Scaling is enabled.
ActiveDocument.Sections["Chart"].DisplayAllTextWithSmartScaling = true