To add existing characteristics to configuration items:
In the Solution view, double-click any entity configuration specification.
The entity Configuration Specification editor opens.
Click the Details tab.
In the Details tab data tree area, right-click a configuration item and select Select Characteristic.
The Select Characteristic dialog box appears. See "Select Characteristic Dialog Box" for more information.
Select a characteristic from the list and click OK.
The characteristic is added to the configuration item in the Details tab data tree.
From the File menu, select Save.