When we output an ODB++ file, the Height of component is zero. The Height in Attached Properties in the Part Properties dialog in Layout is 0 (mm) or value plus mm (no parentheses) .
The Height value in um will automatically be converted to a value in mm or inch, whichever is set in the ODB++ configuration.
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Note: If place a part from CL View, the property Height is from Part Editor, the unit will be automatically converted to um after being placed in the schematic.