Select a unit and click on the Edit... button in the Units section of the Edit String dialog. The Edit Unit dialog appears, allowing you to edit the unit ’ >s> serial number and label, and add user data. You can also indicate whether the unit is actually physically installed, and if the unit serial number should be applied to all devices within the unit. Note that if some of the devices have a different serial number, HCM will warn you that this information will be lost by applying the unit serial number to all its devices.
Figure 1. Edit Unit