At any time, you can add new objects to a logical group. When you add a new object, it gets tied to that logical group.
To add new object to the logical group
While one or more objects belonging to the same presumed logical group are selected, right-click, point to Logical Groups, and then click Add to Group. The confirmation is displayed:
Click Yes to add object to the shown group.
If all the selected objects are already part of the group while you attempted to add them to an existing logical group, the following warning is displayed:
If the selected objects belong to more logical groups, Fred can't know to which group to add, so the warning is displayed:
Note
The feature is available only in the version 2.1 and newer, and only if you did not disable manual logical groups.