To Delete a Custom Unit
You can delete a custom unit that you previously created. You cannot delete a predefined unit. Use caution when deleting units; you cannot undo the deletion.
1. Click > > . The Model Properties dialog box opens.
2. Click change in the Units line. The Units Manager dialog box opens to the Systems of Units tab.
3. Click the Units tab. A description of the selected unit appears under Description.
4. Select a custom unit that you want to delete, and then click Delete. A warning message appears and lists the unit you have selected for deletion.
5. Click Confirm to delete the unit.