Since all rooms assigned to a particular unit group will share the same HVR properties (i.e. number of units in room, opening highlighting and so on), you may want to create one or more duplicates to allow the same basic type of unit (HVR Z, HVR X or HVR X+) to be used with different properties on each. To duplicate a group, right-click on it in the grouping scheme and select the Duplicate item – this will then create a new unit group below the right-clicked group that can be edited and assigned to independently.