Extract agents from an agent group

Create an agent group. Add a gridLayout module. In the options select the agent type name you entered previously in the "agentType" field (i.e. testRobot). Set the "size" field to (3,1,3). Then add a stateMachine module. From the Settings section change the display type from skeleton to skin.

Click on the time slider rewind button and your 9 agents will appear in the viewport.

Scroll down and click on the agent selection tool button.

Select some agents in the viewport.

Now click on the separate button in the Atoms shelf.  

Rewind, select the new agent group node and move it to another position.