The article "How to create groups in Infrastructure Manager" provides instructions for activating groups in Infrastructure Manager (IM) and then how to create new groups.
To add robots to a robot group, you can either use the Tools->Find utility to find a set of robots that you want to include in a group, select all of the robots in the Find GUI result pane, drag and then drop them on the group you wish to add them to in the left-hand pane of IM.? You can also locate robots listed in the upper right-hand pane of IM after selecting a robot.? You would then select the set of robots that you want to include in the group, then drag and drop them on the group to add them to in the left-hand pane of IM.
The process is identical for adding probes to a Probe group that you can create in IM.
To delete robots from an existing group in IM, right-click on the group and select Properties from the drop down menu.? Select the set of robots that you want to delete from the group's Properties GUI and select the Delete button.
Again, the process is identical for deleting probes from a Probe group that you can create in IM.