To Create a Copy of an Individual Unit
You can create a copy of any existing unit, including both custom units you previously created and system-provided units. You can also use this method as a way of renaming an existing unit.
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.
4. Select the unit you want to copy, and then click Copy. The Copy Unit dialog box opens.
5. Under New system of units name, use the default name provided for the new unit (unit1, unit2, and so on), or type a new name.
6. Click OK. The new unit is created and appears in the list.
To edit the new units system, double-click the new unit in the list, or select the new unit and then click Edit. Then use the Unit Definition dialog box to redefine the unit.