USER'S GUIDE - ShipWeight

Additional features
4.11.8 UnitWeight Function
The Code Definition dialog has a column for sub codes where a UnitWeight
can be defined for a sub code.
This value set in this UnitWeight column can be utilized for automatic setting
of the UnitWeight quantity field in ShipWeight Item dialog.
To activate a custom code to automatically set UnitWeight based on selection
of sub code, the custom code intended for this use must be set in the Options
dialog (menu View->Options…) in the Item tab sheet.
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ShipWeight – User’s Guide, version 10.0, April 2011